56742820 has 12 divisors (see below), whose sum is σ = 119159964. Its totient is φ = 22697120.

The previous prime is 56742809. The next prime is 56742823. The reversal of 56742820 is 2824765.

56742820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 7518564 + 49224256 = 2742^2 + 7016^2 .

It is not an unprimeable number, because it can be changed into a prime (56742823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1418551 + ... + 1418590.

It is an arithmetic number, because the mean of its divisors is an integer number (9929997).

Almost surely, 2^56742820 is an apocalyptic number.

It is an amenable number.

56742820 is an abundant number, since it is smaller than the sum of its proper divisors (62417144).

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

56742820 is a wasteful number, since it uses less digits than its factorization.

56742820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2837150 (or 2837148 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 56742820 is about 7532.7830182476. The cubic root of 56742820 is about 384.2704348612.

The spelling of 56742820 in words is "fifty-six million, seven hundred forty-two thousand, eight hundred twenty".