56640344 has 8 divisors (see below), whose sum is σ = 106200660. Its totient is φ = 28320168.

The previous prime is 56640323. The next prime is 56640347. The reversal of 56640344 is 44304665.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 56640344.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56640347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3540014 + ... + 3540029.

Almost surely, 2^56640344 is an apocalyptic number.

It is an amenable number.

56640344 is a deficient number, since it is larger than the sum of its proper divisors (49560316).

56640344 is a wasteful number, since it uses less digits than its factorization.

56640344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7080049 (or 7080045 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 32.

The square root of 56640344 is about 7525.9779430982. The cubic root of 56640344 is about 384.0389681229.

The spelling of 56640344 in words is "fifty-six million, six hundred forty thousand, three hundred forty-four".