79905864 has 32 divisors (see below), whose sum is σ = 208451520. Its totient is φ = 25477056.

The previous prime is 79905857. The next prime is 79905877. The reversal of 79905864 is 46850997.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71827 + ... + 72930.

It is an arithmetic number, because the mean of its divisors is an integer number (6514110).

Almost surely, 2^79905864 is an apocalyptic number.

It is an amenable number.

79905864 is an abundant number, since it is smaller than the sum of its proper divisors (128545656).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

79905864 is a wasteful number, since it uses less digits than its factorization.

79905864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144789 (or 144785 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 48.

The square root of 79905864 is about 8939.0079986540. The cubic root of 79905864 is about 430.7178634524.

The spelling of 79905864 in words is "seventy-nine million, nine hundred five thousand, eight hundred sixty-four".