79431864 has 16 divisors (see below), whose sum is σ = 198579720. Its totient is φ = 26477280.

The previous prime is 79431851. The next prime is 79431887. The reversal of 79431864 is 46813497.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1654807 + ... + 1654854.

Almost surely, 2^79431864 is an apocalyptic number.

It is an amenable number.

79431864 is an abundant number, since it is smaller than the sum of its proper divisors (119147856).

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

79431864 is a wasteful number, since it uses less digits than its factorization.

79431864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3309670 (or 3309666 counting only the distinct ones).

The product of its digits is 145152, while the sum is 42.

The square root of 79431864 is about 8912.4555538864. The cubic root of 79431864 is about 429.8645039105.

The spelling of 79431864 in words is "seventy-nine million, four hundred thirty-one thousand, eight hundred sixty-four".