In number theory, a practical number or panarithmic number is a positive integer n {\displaystyle n} such that all smaller positive integers can be represented...

Thus every even perfect number is a pernicious number. Every even perfect number is also a practical number (cf. Related concepts). Unsolved...

(positive only) values with a Gaussian distribution; however When using practical number representations, the infinite "tails" of the distribution have to be...

(a number all of whose digits are equal), and 888 = 24 × 37. {\displaystyle 888=24\times 37.} Where 37 is the 12th prime number. 888 is a practical number...

the integer following 233 and preceding 235. Additionally: 234 is a practical number. There are 234 ways of grouping six children into rings of at least...

number, a highly composite number, an abundant number, a practical number, a congruent congruent number. An icositetragon is a regular polygon with 24 sides...

semiperfect is called a weird number. With the exception of 2, all primary pseudoperfect numbers are semiperfect. Every practical number that is not a power of...

Practical Ethics, a 1979 book by the moral philosopher Peter Singer, is an introduction to applied ethics. Singer analyzes, in detail, why and how beings'...

factorization of a highly composite number uses all of the first k primes, every highly composite number must be a practical number. Due to their ease of use in...

Practical Kabbalah (Hebrew: קַבָּלָה מַעֲשִׂית Kabbalah Ma'asit) in historical Judaism, is a branch of the Jewish mystical tradition that concerns the...

Idoneal number. It is a Harshad number, as it is divisible by the sum of its digits. It's part of the Pythagorean triplets. It's a practical number. "A000926...

In the United States, Optional Practical Training (OPT) is a period during which undergraduate and graduate students with F-1 status who have completed...

A licensed practical nurse (LPN), in much of the United States and Canada, is a nurse who provides direct nursing care for people who are sick, injured...

Old Possum's Book of Practical Cats (1939) is a collection of whimsical light poems by T. S. Eliot about feline psychology and sociology, published by...

natural number following 207 and preceding 209. 208 is a practical number, a tetranacci number, a rhombic matchstick number, a happy number, and a member...

date. Practical Mechanics was one of a number of DIY British publications, including Practical Householder, Practical Motorist, and Practical Wireless...

making it an amicable number with 284. Every number up to 220 may be expressed as a sum of its divisors, making 220 a practical number. It is the sum of four...

coax cables have a maximum length of 185 metres (607 ft). The maximum practical number of nodes that can be connected to a 10BASE2 segment is limited to 30...

the two screens, allowing for a total of 8192 colors per frame (the practical number may be less due to some of the colors being considered transparent)...

twenty-eight) is the natural number following 227 and preceding 229. 228 is a refactorable number and a practical number. There are 228 matchings in a...

Practical Television, later known as Television and subsequently Television & Consumer Electronics, was a UK magazine for the electronics/TV servicing...

arithmetic, a term which may also refer to number theory, the study of the properties of numbers. Besides their practical uses, numbers have cultural significance...

Practical philosophy concerns itself mainly with subjects that have applications in life, like the study of values, norms, politics, art, etc. The modern...

consequences of 180 having so many divisors is that it is a practical number, meaning that any positive number smaller than 180 that is not a divisor of 180 can...

cryptography include: Aumasson, Jean-Philippe (2017), Serious Cryptography: A Practical Introduction to Modern Encryption. No Starch Press, 2017, ISBN 9781593278267...

semiperfect number, as it is smaller than the sum of its proper divisors yet equal to the sum of a subset of its proper divisors. It is a practical number as each...

(seven) is the natural number following 6 and preceding 8. It is the only prime number preceding a cube. As an early prime number in the series of positive...

whenever the denominator is a practical number, and Liber Abaci includes tables of expansions of this type for the practical numbers 6, 8, 12, 20, 24, 60...

semiperfect number, and a practical number. 176 is a cake number, a happy number, a pentagonal number, and an octagonal number. 15 can be partitioned in...

The Critique of Practical Reason (German: Kritik der praktischen Vernunft) is the second of Immanuel Kant's three critiques, published in 1788. Hence...