56973618 has 60 divisors (see below), whose sum is σ = 138305178. Its totient is φ = 17521920.

The previous prime is 56973563. The next prime is 56973619. The reversal of 56973618 is 81637965.

It is a happy number.

56973618 is a `hidden beast` number, since 569 + 73 + 6 + 18 = 666.

56973618 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 3 ways, for example, as 25130169 + 31843449 = 5013^2 + 5643^2 .

It is not an unprimeable number, because it can be changed into a prime (56973619) 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 29 ways as a sum of consecutive naturals, for example, 26338 + ... + 28418.

Almost surely, 2^56973618 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56973618, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69152589).

56973618 is an abundant number, since it is smaller than the sum of its proper divisors (81331560).

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

56973618 is a wasteful number, since it uses less digits than its factorization.

56973618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2121 (or 2099 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 56973618 is about 7548.0870424234. The cubic root of 56973618 is about 384.7907290194.

The spelling of 56973618 in words is "fifty-six million, nine hundred seventy-three thousand, six hundred eighteen".