57187280 has 20 divisors (see below), whose sum is σ = 132960612. Its totient is φ = 22874880.

The previous prime is 57187271. The next prime is 57187289. The reversal of 57187280 is 8278175.

57187280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (57187271) and next prime (57187289).

It can be written as a sum of positive squares in 2 ways, for example, as 27331984 + 29855296 = 5228^2 + 5464^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57187289) by changing a digit.

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, 357341 + ... + 357500.

Almost surely, 2^57187280 is an apocalyptic number.

It is an amenable number.

57187280 is an abundant number, since it is smaller than the sum of its proper divisors (75773332).

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

57187280 is a wasteful number, since it uses less digits than its factorization.

57187280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 714854 (or 714848 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 38.

The square root of 57187280 is about 7562.2271851618. The cubic root of 57187280 is about 385.2711419954.

The spelling of 57187280 in words is "fifty-seven million, one hundred eighty-seven thousand, two hundred eighty".