56404557 has 24 divisors (see below), whose sum is σ = 89712480. Its totient is φ = 33864480.

The previous prime is 56404549. The next prime is 56404567. The reversal of 56404557 is 75540465.

It is a happy number.

56404557 is a `hidden beast` number, since 5 + 640 + 4 + 5 + 5 + 7 = 666.

It is not a de Polignac number, because 56404557 - 2³ = 56404549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56404547) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8178 + ... + 13404.

It is an arithmetic number, because the mean of its divisors is an integer number (3738020).

Almost surely, 2^56404557 is an apocalyptic number.

It is an amenable number.

56404557 is a deficient number, since it is larger than the sum of its proper divisors (33307923).

56404557 is a wasteful number, since it uses less digits than its factorization.

56404557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5353 (or 5350 counting only the distinct ones).

The product of its (nonzero) digits is 84000, while the sum is 36.

The square root of 56404557 is about 7510.2967318209. The cubic root of 56404557 is about 383.5053241233.

The spelling of 56404557 in words is "fifty-six million, four hundred four thousand, five hundred fifty-seven".