56565720 has 48 divisors (see below), whose sum is σ = 183839760. Its totient is φ = 15084096.

The previous prime is 56565713. The next prime is 56565811. The reversal of 56565720 is 2756565.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78204 + ... + 78923.

It is an arithmetic number, because the mean of its divisors is an integer number (3829995).

Almost surely, 2^56565720 is an apocalyptic number.

It is an amenable number.

56565720 is an abundant number, since it is smaller than the sum of its proper divisors (127274040).

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

56565720 is a wasteful number, since it uses less digits than its factorization.

56565720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157144 (or 157137 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 36.

The square root of 56565720 is about 7521.0185480425. The cubic root of 56565720 is about 383.8702361022.

The spelling of 56565720 in words is "fifty-six million, five hundred sixty-five thousand, seven hundred twenty".