56639568 has 20 divisors (see below), whose sum is σ = 146319008. Its totient is φ = 18879840.

The previous prime is 56639549. The next prime is 56639591. The reversal of 56639568 is 86593665.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 1179991 = 56639568 / (5 + 6 + 6 + 3 + 9 + 5 + 6 + 8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 589948 + ... + 590043.

Almost surely, 2^56639568 is an apocalyptic number.

It is an amenable number.

56639568 is an abundant number, since it is smaller than the sum of its proper divisors (89679440).

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

56639568 is a wasteful number, since it uses less digits than its factorization.

56639568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1180002 (or 1179996 counting only the distinct ones).

The product of its digits is 1166400, while the sum is 48.

The square root of 56639568 is about 7525.9263881598. The cubic root of 56639568 is about 384.0372142753.

The spelling of 56639568 in words is "fifty-six million, six hundred thirty-nine thousand, five hundred sixty-eight".