56403640 has 32 divisors (see below), whose sum is σ = 127456560. Its totient is φ = 22464000.

The previous prime is 56403631. The next prime is 56403643. The reversal of 56403640 is 4630465.

It is a junction number, because it is equal to n+sod(n) for n = 56403599 and 56403608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56403643) 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, 6715 + ... + 12565.

Almost surely, 2^56403640 is an apocalyptic number.

It is an amenable number.

56403640 is an abundant number, since it is smaller than the sum of its proper divisors (71052920).

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

56403640 is a wasteful number, since it uses less digits than its factorization.

56403640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6103 (or 6099 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 56403640 is about 7510.2356820542. The cubic root of 56403640 is about 383.5032458262.

The spelling of 56403640 in words is "fifty-six million, four hundred three thousand, six hundred forty".