57144860 has 24 divisors (see below), whose sum is σ = 120775200. Its totient is φ = 22711104.

The previous prime is 57144859. The next prime is 57144869. The reversal of 57144860 is 6844175.

It is a self number, because there is not a number n which added to its sum of digits gives 57144860.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57144869) 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, 5960 + ... + 12239.

It is an arithmetic number, because the mean of its divisors is an integer number (5032300).

Almost surely, 2^57144860 is an apocalyptic number.

It is an amenable number.

57144860 is an abundant number, since it is smaller than the sum of its proper divisors (63630340).

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

57144860 is a wasteful number, since it uses less digits than its factorization.

57144860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18365 (or 18363 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 57144860 is about 7559.4219355715. The cubic root of 57144860 is about 385.1758571436.

The spelling of 57144860 in words is "fifty-seven million, one hundred forty-four thousand, eight hundred sixty".