57237940 has 12 divisors (see below), whose sum is σ = 120199716. Its totient is φ = 22895168.

The previous prime is 57237919. The next prime is 57237941. The reversal of 57237940 is 4973275.

57237940 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 30426256 + 26811684 = 5516^2 + 5178^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 57237940.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57237941) 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, 1430929 + ... + 1430968.

It is an arithmetic number, because the mean of its divisors is an integer number (10016643).

Almost surely, 2^57237940 is an apocalyptic number.

It is an amenable number.

57237940 is an abundant number, since it is smaller than the sum of its proper divisors (62961776).

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

57237940 is a wasteful number, since it uses less digits than its factorization.

57237940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2861906 (or 2861904 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 37.

The square root of 57237940 is about 7565.5759860040. The cubic root of 57237940 is about 385.3848740207.

The spelling of 57237940 in words is "fifty-seven million, two hundred thirty-seven thousand, nine hundred forty".