56320640 has 32 divisors (see below), whose sum is σ = 134643060. Its totient is φ = 22528000.

The previous prime is 56320631. The next prime is 56320651. The reversal of 56320640 is 4602365.

It can be written as a sum of positive squares in 2 ways, for example, as 47224384 + 9096256 = 6872^2 + 3016^2 .

It is a tau number, because it is divible by the number of its divisors (32).

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 in 3 ways as a sum of consecutive naturals, for example, 43361 + ... + 44640.

Almost surely, 2^56320640 is an apocalyptic number.

It is an amenable number.

56320640 is an abundant number, since it is smaller than the sum of its proper divisors (78322420).

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

56320640 is an equidigital number, since it uses as much as digits as its factorization.

56320640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88020 (or 88008 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 56320640 is about 7504.7078557396. The cubic root of 56320640 is about 383.3150405049.

The spelling of 56320640 in words is "fifty-six million, three hundred twenty thousand, six hundred forty".