57157120 has 80 divisors (see below), whose sum is σ = 139209840. Its totient is φ = 22503424.

The previous prime is 57157117. The next prime is 57157127. The reversal of 57157120 is 2175175.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57157127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212346 + ... + 212614.

It is an arithmetic number, because the mean of its divisors is an integer number (1740123).

Almost surely, 2^57157120 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57157120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69604920).

57157120 is an abundant number, since it is smaller than the sum of its proper divisors (82052720).

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

57157120 is an equidigital number, since it uses as much as digits as its factorization.

57157120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375 (or 359 counting only the distinct ones).

The product of its (nonzero) digits is 2450, while the sum is 28.

The square root of 57157120 is about 7560.2328006484. The cubic root of 57157120 is about 385.2034007019.

The spelling of 57157120 in words is "fifty-seven million, one hundred fifty-seven thousand, one hundred twenty".