28577564 has 12 divisors (see below), whose sum is σ = 50613864. Its totient is φ = 14116464.

The previous prime is 28577537. The next prime is 28577573. The reversal of 28577564 is 46577582.

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, 42707 + ... + 43370.

It is an arithmetic number, because the mean of its divisors is an integer number (4217822).

Almost surely, 2^28577564 is an apocalyptic number.

It is an amenable number.

28577564 is a deficient number, since it is larger than the sum of its proper divisors (22036300).

28577564 is a wasteful number, since it uses less digits than its factorization.

28577564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86164 (or 86162 counting only the distinct ones).

The product of its digits is 470400, while the sum is 44.

The square root of 28577564 is about 5345.7987242320. The cubic root of 28577564 is about 305.7325899392.

The spelling of 28577564 in words is "twenty-eight million, five hundred seventy-seven thousand, five hundred sixty-four".