28557488 has 20 divisors (see below), whose sum is σ = 56826720. Its totient is φ = 13892544.

The previous prime is 28557469. The next prime is 28557491. The reversal of 28557488 is 88475582.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23528 + ... + 24711.

It is an arithmetic number, because the mean of its divisors is an integer number (2841336).

Almost surely, 2^28557488 is an apocalyptic number.

It is an amenable number.

28557488 is a deficient number, since it is larger than the sum of its proper divisors (28269232).

28557488 is a wasteful number, since it uses less digits than its factorization.

28557488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48284 (or 48278 counting only the distinct ones).

The product of its digits is 716800, while the sum is 47.

The square root of 28557488 is about 5343.9206580936. The cubic root of 28557488 is about 305.6609798544.

The spelling of 28557488 in words is "twenty-eight million, five hundred fifty-seven thousand, four hundred eighty-eight".