56520640 has 56 divisors (see below), whose sum is σ = 146834352. Its totient is φ = 20551680.

The previous prime is 56520613. The next prime is 56520641. The reversal of 56520640 is 4602565.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 56520599 and 56520608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56520641) 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, 4509 + ... + 11548.

It is an arithmetic number, because the mean of its divisors is an integer number (2622042).

Almost surely, 2^56520640 is an apocalyptic number.

It is an amenable number.

56520640 is an abundant number, since it is smaller than the sum of its proper divisors (90313712).

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

56520640 is a wasteful number, since it uses less digits than its factorization.

56520640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16085 (or 16075 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 56520640 is about 7518.0210161983. The cubic root of 56520640 is about 383.7682339867.

The spelling of 56520640 in words is "fifty-six million, five hundred twenty thousand, six hundred forty".