56408457 has 24 divisors (see below), whose sum is σ = 87780000. Its totient is φ = 32126976.

The previous prime is 56408453. The next prime is 56408459. The reversal of 56408457 is 75480465.

It is not a de Polignac number, because 56408457 - 2² = 56408453 is a prime.

It is a super-2 number, since 2×56408457² = 6363828042241698, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (56408453) 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, 72969 + ... + 73737.

It is an arithmetic number, because the mean of its divisors is an integer number (3657500).

Almost surely, 2^56408457 is an apocalyptic number.

It is an amenable number.

56408457 is a deficient number, since it is larger than the sum of its proper divisors (31371543).

56408457 is a wasteful number, since it uses less digits than its factorization.

56408457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1285 (or 1278 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 39.

The square root of 56408457 is about 7510.5563708689. The cubic root of 56408457 is about 383.5141628672.

It can be divided in two parts, 56408 and 457, that added together give a palindrome (56865).

The spelling of 56408457 in words is "fifty-six million, four hundred eight thousand, four hundred fifty-seven".