56640938 has 16 divisors (see below), whose sum is σ = 89718720. Its totient is φ = 26744256.

The previous prime is 56640917. The next prime is 56640949. The reversal of 56640938 is 83904665.

It is a junction number, because it is equal to n+sod(n) for n = 56640895 and 56640904.

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 7 ways as a sum of consecutive naturals, for example, 10595 + ... + 15017.

It is an arithmetic number, because the mean of its divisors is an integer number (5607420).

Almost surely, 2^56640938 is an apocalyptic number.

56640938 is a deficient number, since it is larger than the sum of its proper divisors (33077782).

56640938 is a wasteful number, since it uses less digits than its factorization.

56640938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4781.

The product of its (nonzero) digits is 155520, while the sum is 41.

The square root of 56640938 is about 7526.0174063046. The cubic root of 56640938 is about 384.0403106192.

The spelling of 56640938 in words is "fifty-six million, six hundred forty thousand, nine hundred thirty-eight".