56403972 has 24 divisors (see below), whose sum is σ = 146232800. Its totient is φ = 18801288.

The previous prime is 56403953. The next prime is 56403979. The reversal of 56403972 is 27930465.

56403972 is a `hidden beast` number, since 5 + 640 + 3 + 9 + 7 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (56403979) 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, 261022 + ... + 261237.

Almost surely, 2^56403972 is an apocalyptic number.

It is an amenable number.

56403972 is an abundant number, since it is smaller than the sum of its proper divisors (89828828).

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

56403972 is a wasteful number, since it uses less digits than its factorization.

56403972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522272 (or 522264 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 56403972 is about 7510.2577851895. The cubic root of 56403972 is about 383.5039982766.

It can be divided in two parts, 56403 and 972, that added together give a palindrome (57375).

The spelling of 56403972 in words is "fifty-six million, four hundred three thousand, nine hundred seventy-two".