56405808 has 100 divisors (see below), whose sum is σ = 165824208. Its totient is φ = 18506880.

The previous prime is 56405747. The next prime is 56405819. The reversal of 56405808 is 80850465.

It is a happy number.

56405808 is a `hidden beast` number, since 5 + 640 + 5 + 8 + 0 + 8 = 666.

It is a super-2 number, since 2×56405808² = 6363230352265728, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 91710 + ... + 92322.

Almost surely, 2^56405808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56405808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82912104).

56405808 is an abundant number, since it is smaller than the sum of its proper divisors (109418400).

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

56405808 is a wasteful number, since it uses less digits than its factorization.

56405808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704 (or 689 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The square root of 56405808 is about 7510.3800170164. The cubic root of 56405808 is about 383.5081593648.

The spelling of 56405808 in words is "fifty-six million, four hundred five thousand, eight hundred eight".