79812644 has 24 divisors (see below), whose sum is σ = 145282368. Its totient is φ = 38334240.

The previous prime is 79812617. The next prime is 79812653. The reversal of 79812644 is 44621897.

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, 6689 + ... + 14295.

It is an arithmetic number, because the mean of its divisors is an integer number (6053432).

Almost surely, 2^79812644 is an apocalyptic number.

It is an amenable number.

79812644 is a deficient number, since it is larger than the sum of its proper divisors (65469724).

79812644 is a wasteful number, since it uses less digits than its factorization.

79812644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7715 (or 7713 counting only the distinct ones).

The product of its digits is 96768, while the sum is 41.

The square root of 79812644 is about 8933.7922518939. The cubic root of 79812644 is about 430.5503031873.

The spelling of 79812644 in words is "seventy-nine million, eight hundred twelve thousand, six hundred forty-four".