Number Gossip
(Enter a number and I'll tell you everything you wanted to know about it but were afraid to ask.)
Unique Properties of 7396
- 7396 is the smallest number n such that the first nine digits of the decimal part of n1/4 is an anagram of the nonzero digits 1-9
Rare Properties of 7396
The number n is called an aspiring number if its aliquot sequence terminates in a perfect number, and it is not a perfect number itself.
The number n is a square if it is the square of an integer.
Common Properties of 7396
The number n is called an apocalyptic power if 2n contains the consecutive digits 666 (in decimal).
A positive integer greater than 1 that is not prime is called composite.
Composite numbers are opposite to prime numbers.
The number n is deficient if the sum of all its positive divisors except itself is less than n.
Compare with perfect and abundant numbers.
A number is even if it is divisible by 2.
Numbers that are not even are odd. Compare with another pair -- evil and odious numbers.
The number n is odious if it has an odd number of 1's in its binary expansion.
Guess what evil numbers are.
An integer n is powerful if for every prime p dividing n, p2 also divides n.
How much power? They all can be written as a2 b3.