57275280 has 60 divisors (see below), whose sum is σ = 192351900. Its totient is φ = 15273216.

The previous prime is 57275233. The next prime is 57275287. The reversal of 57275280 is 8257275.

57275280 is a `hidden beast` number, since 572 + 7 + 5 + 2 + 80 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 44997264 + 12278016 = 6708^2 + 3504^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (57275287) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39055 + ... + 40494.

It is an arithmetic number, because the mean of its divisors is an integer number (3205865).

Almost surely, 2^57275280 is an apocalyptic number.

It is an amenable number.

57275280 is an abundant number, since it is smaller than the sum of its proper divisors (135076620).

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

57275280 is a wasteful number, since it uses less digits than its factorization.

57275280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79568 (or 79559 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 36.

The square root of 57275280 is about 7568.0433402564. The cubic root of 57275280 is about 385.4686596070.

The spelling of 57275280 in words is "fifty-seven million, two hundred seventy-five thousand, two hundred eighty".