56405632 has 16 divisors (see below), whose sum is σ = 112370850. Its totient is φ = 28202752.

The previous prime is 56405617. The next prime is 56405659. The reversal of 56405632 is 23650465.

It can be written as a sum of positive squares in only one way, i.e., 51494976 + 4910656 = 7176^2 + 2216^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 56405594 and 56405603.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220207 + ... + 220462.

Almost surely, 2^56405632 is an apocalyptic number.

It is an amenable number.

56405632 is a deficient number, since it is larger than the sum of its proper divisors (55965218).

56405632 is an equidigital number, since it uses as much as digits as its factorization.

56405632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440683 (or 440671 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 56405632 is about 7510.3682998905. The cubic root of 56405632 is about 383.5077604844.

The spelling of 56405632 in words is "fifty-six million, four hundred five thousand, six hundred thirty-two".