56639924 has 24 divisors (see below), whose sum is σ = 109750368. Its totient is φ = 25359840.

The previous prime is 56639923. The next prime is 56639951. The reversal of 56639924 is 42993665.

56639924 = T₃₁₇ + T₃₁₈ + ... + T₇₁₈.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56639923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6659 + ... + 12554.

It is an arithmetic number, because the mean of its divisors is an integer number (4572932).

Almost surely, 2^56639924 is an apocalyptic number.

It is an amenable number.

56639924 is a deficient number, since it is larger than the sum of its proper divisors (53110444).

56639924 is a wasteful number, since it uses less digits than its factorization.

56639924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19295 (or 19293 counting only the distinct ones).

The product of its digits is 349920, while the sum is 44.

The square root of 56639924 is about 7525.9500396960. The cubic root of 56639924 is about 384.0380188775.

The spelling of 56639924 in words is "fifty-six million, six hundred thirty-nine thousand, nine hundred twenty-four".