56621770 has 16 divisors (see below), whose sum is σ = 103148640. Its totient is φ = 22375504.

The previous prime is 56621753. The next prime is 56621771. The reversal of 56621770 is 7712665.

It is not an unprimeable number, because it can be changed into a prime (56621771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33280 + ... + 34939.

It is an arithmetic number, because the mean of its divisors is an integer number (6446790).

Almost surely, 2^56621770 is an apocalyptic number.

56621770 is a deficient number, since it is larger than the sum of its proper divisors (46526870).

56621770 is a wasteful number, since it uses less digits than its factorization.

56621770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68309.

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 56621770 is about 7524.7438494609. The cubic root of 56621770 is about 383.9969843875.

The spelling of 56621770 in words is "fifty-six million, six hundred twenty-one thousand, seven hundred seventy".