56406656 has 16 divisors (see below), whose sum is σ = 112372890. Its totient is φ = 28203264.

The previous prime is 56406641. The next prime is 56406661. The reversal of 56406656 is 65660465.

It can be written as a sum of positive squares in only one way, i.e., 49224256 + 7182400 = 7016^2 + 2680^2 .

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

It is a super-2 number, since 2×56406656² = 6363421682204672, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220211 + ... + 220466.

Almost surely, 2^56406656 is an apocalyptic number.

It is an amenable number.

56406656 is a deficient number, since it is larger than the sum of its proper divisors (55966234).

56406656 is an equidigital number, since it uses as much as digits as its factorization.

56406656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440691 (or 440679 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 38.

The square root of 56406656 is about 7510.4364720035. The cubic root of 56406656 is about 383.5100812312.

The spelling of 56406656 in words is "fifty-six million, four hundred six thousand, six hundred fifty-six".