28557560 has 16 divisors (see below), whose sum is σ = 64254600. Its totient is φ = 11423008.

The previous prime is 28557553. The next prime is 28557643. The reversal of 28557560 is 6575582.

It is a congruent number.

It is an unprimeable number.

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, 356930 + ... + 357009.

Almost surely, 2^28557560 is an apocalyptic number.

28557560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28557560 is an abundant number, since it is smaller than the sum of its proper divisors (35697040).

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

28557560 is a wasteful number, since it uses less digits than its factorization.

28557560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713950 (or 713946 counting only the distinct ones).

The product of its (nonzero) digits is 84000, while the sum is 38.

The square root of 28557560 is about 5343.9273947164. The cubic root of 28557560 is about 305.6612367348.

The spelling of 28557560 in words is "twenty-eight million, five hundred fifty-seven thousand, five hundred sixty".