56172904 has 16 divisors (see below), whose sum is σ = 106348320. Its totient is φ = 27813360.

The previous prime is 56172889. The next prime is 56172917. The reversal of 56172904 is 40927165.

It is a self number, because there is not a number n which added to its sum of digits gives 56172904.

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, 33262 + ... + 34909.

It is an arithmetic number, because the mean of its divisors is an integer number (6646770).

Almost surely, 2^56172904 is an apocalyptic number.

It is an amenable number.

56172904 is a deficient number, since it is larger than the sum of its proper divisors (50175416).

56172904 is a wasteful number, since it uses less digits than its factorization.

56172904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68280 (or 68276 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 56172904 is about 7494.8585043348. The cubic root of 56172904 is about 382.9795861112.

The spelling of 56172904 in words is "fifty-six million, one hundred seventy-two thousand, nine hundred four".