56640624 has 20 divisors (see below), whose sum is σ = 146321736. Its totient is φ = 18880192.

The previous prime is 56640613. The next prime is 56640637. The reversal of 56640624 is 42604665.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 589959 + ... + 590054.

Almost surely, 2^56640624 is an apocalyptic number.

It is an amenable number.

56640624 is an abundant number, since it is smaller than the sum of its proper divisors (89681112).

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

56640624 is a wasteful number, since it uses less digits than its factorization.

56640624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1180024 (or 1180018 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 56640624 is about 7525.9965453088. The cubic root of 56640624 is about 384.0396009506.

The spelling of 56640624 in words is "fifty-six million, six hundred forty thousand, six hundred twenty-four".