57120870 has 16 divisors (see below), whose sum is σ = 137090160. Its totient is φ = 15232224.

The previous prime is 57120857. The next prime is 57120883. The reversal of 57120870 is 7802175.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (57120857) and next prime (57120883).

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 1904029 = 57120870 / (5 + 7 + 1 + 2 + 0 + 8 + 7 + 0).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 951985 + ... + 952044.

It is an arithmetic number, because the mean of its divisors is an integer number (8568135).

Almost surely, 2^57120870 is an apocalyptic number.

57120870 is an abundant number, since it is smaller than the sum of its proper divisors (79969290).

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

57120870 is a wasteful number, since it uses less digits than its factorization.

57120870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1904039.

The product of its (nonzero) digits is 3920, while the sum is 30.

The square root of 57120870 is about 7557.8350074608. The cubic root of 57120870 is about 385.1219493370.

The spelling of 57120870 in words is "fifty-seven million, one hundred twenty thousand, eight hundred seventy".