57057920 has 32 divisors (see below), whose sum is σ = 136405620. Its totient is φ = 22822912.

The previous prime is 57057919. The next prime is 57057929. The reversal of 57057920 is 2975075.

It can be written as a sum of positive squares in 2 ways, for example, as 54523456 + 2534464 = 7384^2 + 1592^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (57057929) 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, 43937 + ... + 45216.

Almost surely, 2^57057920 is an apocalyptic number.

It is an amenable number.

57057920 is an abundant number, since it is smaller than the sum of its proper divisors (79347700).

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

57057920 is an equidigital number, since it uses as much as digits as its factorization.

57057920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89172 (or 89160 counting only the distinct ones).

The product of its (nonzero) digits is 22050, while the sum is 35.

The square root of 57057920 is about 7553.6693070322. The cubic root of 57057920 is about 384.9804229096.

The spelling of 57057920 in words is "fifty-seven million, fifty-seven thousand, nine hundred twenty".