79686864 has 60 divisors (see below), whose sum is σ = 230219392. Its totient is φ = 25704000.

The previous prime is 79686847. The next prime is 79686899. The reversal of 79686864 is 46868697.

It is a self number, because there is not a number n which added to its sum of digits gives 79686864.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4462 + ... + 13389.

Almost surely, 2^79686864 is an apocalyptic number.

It is an amenable number.

79686864 is an abundant number, since it is smaller than the sum of its proper divisors (150532528).

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

79686864 is a wasteful number, since it uses less digits than its factorization.

79686864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17896 (or 17887 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 54.

The square root of 79686864 is about 8926.7499124821. The cubic root of 79686864 is about 430.3240103449.

The spelling of 79686864 in words is "seventy-nine million, six hundred eighty-six thousand, eight hundred sixty-four".