57120520 has 16 divisors (see below), whose sum is σ = 128521260. Its totient is φ = 22848192.

The previous prime is 57120509. The next prime is 57120533. The reversal of 57120520 is 2502175.

57120520 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 54730404 + 2390116 = 7398^2 + 1546^2 .

It is a junction number, because it is equal to n+sod(n) for n = 57120491 and 57120500.

It is an unprimeable number.

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, 713967 + ... + 714046.

Almost surely, 2^57120520 is an apocalyptic number.

It is an amenable number.

57120520 is an abundant number, since it is smaller than the sum of its proper divisors (71400740).

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

57120520 is a wasteful number, since it uses less digits than its factorization.

57120520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1428024 (or 1428020 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 22.

The square root of 57120520 is about 7557.8118526462. The cubic root of 57120520 is about 385.1211627421.

Adding to 57120520 its reverse (2502175), we get a palindrome (59622695).

The spelling of 57120520 in words is "fifty-seven million, one hundred twenty thousand, five hundred twenty".