56639604 has 48 divisors (see below), whose sum is σ = 155918336. Its totient is φ = 15660000.

The previous prime is 56639591. The next prime is 56639617. The reversal of 56639604 is 40693665.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (56639591) and next prime (56639617).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8272 + ... + 13479.

Almost surely, 2^56639604 is an apocalyptic number.

It is an amenable number.

56639604 is an abundant number, since it is smaller than the sum of its proper divisors (99278732).

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

56639604 is a wasteful number, since it uses less digits than its factorization.

56639604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21796 (or 21794 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 39.

The square root of 56639604 is about 7525.9287798916. The cubic root of 56639604 is about 384.0372956397.

The spelling of 56639604 in words is "fifty-six million, six hundred thirty-nine thousand, six hundred four".