28857560 has 16 divisors (see below), whose sum is σ = 64929600. Its totient is φ = 11543008.

The previous prime is 28857547. The next prime is 28857589. The reversal of 28857560 is 6575882.

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, 360680 + ... + 360759.

It is an arithmetic number, because the mean of its divisors is an integer number (4058100).

Almost surely, 2^28857560 is an apocalyptic number.

28857560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28857560 is an abundant number, since it is smaller than the sum of its proper divisors (36072040).

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

28857560 is a wasteful number, since it uses less digits than its factorization.

28857560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721450 (or 721446 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 41.

The square root of 28857560 is about 5371.9233054838. The cubic root of 28857560 is about 306.7278443375.

The spelling of 28857560 in words is "twenty-eight million, eight hundred fifty-seven thousand, five hundred sixty".