28618564 has 24 divisors (see below), whose sum is σ = 55193600. Its totient is φ = 12900384.

The previous prime is 28618559. The next prime is 28618631. The reversal of 28618564 is 46581682.

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 7 ways as a sum of consecutive naturals, for example, 4164 + ... + 8635.

Almost surely, 2^28618564 is an apocalyptic number.

It is an amenable number.

28618564 is a deficient number, since it is larger than the sum of its proper divisors (26575036).

28618564 is a wasteful number, since it uses less digits than its factorization.

28618564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12859 (or 12857 counting only the distinct ones).

The product of its digits is 92160, while the sum is 40.

The square root of 28618564 is about 5349.6321368857. The cubic root of 28618564 is about 305.8787307640.

The spelling of 28618564 in words is "twenty-eight million, six hundred eighteen thousand, five hundred sixty-four".