57213760 has 28 divisors (see below), whose sum is σ = 136241028. Its totient is φ = 22885376.

The previous prime is 57213757. The next prime is 57213763. The reversal of 57213760 is 6731275.

It is an interprime number because it is at equal distance from previous prime (57213757) and next prime (57213763).

It can be written as a sum of positive squares in 2 ways, for example, as 29419776 + 27793984 = 5424^2 + 5272^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57213763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89077 + ... + 89716.

It is an arithmetic number, because the mean of its divisors is an integer number (4865751).

Almost surely, 2^57213760 is an apocalyptic number.

It is an amenable number.

57213760 is an abundant number, since it is smaller than the sum of its proper divisors (79027268).

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

57213760 is a wasteful number, since it uses less digits than its factorization.

57213760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178810 (or 178800 counting only the distinct ones).

The product of its (nonzero) digits is 8820, while the sum is 31.

The square root of 57213760 is about 7563.9777894967. The cubic root of 57213760 is about 385.3305981402.

The spelling of 57213760 in words is "fifty-seven million, two hundred thirteen thousand, seven hundred sixty".