79139904 has 28 divisors (see below), whose sum is σ = 209391504. Its totient is φ = 26379904.

The previous prime is 79139891. The next prime is 79139911. The reversal of 79139904 is 40993197.

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, 205902 + ... + 206285.

It is an arithmetic number, because the mean of its divisors is an integer number (7478268).

Almost surely, 2^79139904 is an apocalyptic number.

It is an amenable number.

79139904 is an abundant number, since it is smaller than the sum of its proper divisors (130251600).

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

79139904 is a wasteful number, since it uses less digits than its factorization.

79139904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412202 (or 412192 counting only the distinct ones).

The product of its (nonzero) digits is 61236, while the sum is 42.

The square root of 79139904 is about 8896.0611508690. The cubic root of 79139904 is about 429.3371868881.

The spelling of 79139904 in words is "seventy-nine million, one hundred thirty-nine thousand, nine hundred four".