28557160 has 32 divisors (see below), whose sum is σ = 65751840. Its totient is φ = 11156544.

The previous prime is 28557149. The next prime is 28557173. The reversal of 28557160 is 6175582.

It is a super-2 number, since 2×28557160² = 1631022774531200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

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, 6582 + ... + 10021.

It is an arithmetic number, because the mean of its divisors is an integer number (2054745).

Almost surely, 2^28557160 is an apocalyptic number.

28557160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28557160 is an abundant number, since it is smaller than the sum of its proper divisors (37194680).

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

28557160 is a wasteful number, since it uses less digits than its factorization.

28557160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16657 (or 16653 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 34.

The square root of 28557160 is about 5343.8899689271. The cubic root of 28557160 is about 305.6598096163.

The spelling of 28557160 in words is "twenty-eight million, five hundred fifty-seven thousand, one hundred sixty".