57628280 has 16 divisors (see below), whose sum is σ = 129663720. Its totient is φ = 23051296.

The previous prime is 57628261. The next prime is 57628321. The reversal of 57628280 is 8282675.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 720314 + ... + 720393.

Almost surely, 2^57628280 is an apocalyptic number.

It is an amenable number.

57628280 is an abundant number, since it is smaller than the sum of its proper divisors (72035440).

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

57628280 is a wasteful number, since it uses less digits than its factorization.

57628280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1440718 (or 1440714 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 38.

The square root of 57628280 is about 7591.3292643647. The cubic root of 57628280 is about 386.2589472971.

The spelling of 57628280 in words is "fifty-seven million, six hundred twenty-eight thousand, two hundred eighty".