57720120 has 32 divisors (see below), whose sum is σ = 173160720. Its totient is φ = 15392000.

The previous prime is 57720101. The next prime is 57720163. The reversal of 57720120 is 2102775.

It is a super-2 number, since 2×57720120² = 6663224505628800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 240381 + ... + 240620.

Almost surely, 2^57720120 is an apocalyptic number.

It is an amenable number.

57720120 is an abundant number, since it is smaller than the sum of its proper divisors (115440600).

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

57720120 is a wasteful number, since it uses less digits than its factorization.

57720120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481015 (or 481011 counting only the distinct ones).

The product of its (nonzero) digits is 980, while the sum is 24.

The square root of 57720120 is about 7597.3758627568. The cubic root of 57720120 is about 386.4640271286.

Adding to 57720120 its reverse (2102775), we get a palindrome (59822895).

The spelling of 57720120 in words is "fifty-seven million, seven hundred twenty thousand, one hundred twenty".