28625564 has 12 divisors (see below), whose sum is σ = 54648888. Its totient is φ = 13011600.

The previous prime is 28625557. The next prime is 28625579. The reversal of 28625564 is 46552682.

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, 325247 + ... + 325334.

It is an arithmetic number, because the mean of its divisors is an integer number (4554074).

Almost surely, 2^28625564 is an apocalyptic number.

It is an amenable number.

28625564 is a deficient number, since it is larger than the sum of its proper divisors (26023324).

28625564 is a wasteful number, since it uses less digits than its factorization.

28625564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650596 (or 650594 counting only the distinct ones).

The product of its digits is 115200, while the sum is 38.

The square root of 28625564 is about 5350.2863474771. The cubic root of 28625564 is about 305.9036676846.

The spelling of 28625564 in words is "twenty-eight million, six hundred twenty-five thousand, five hundred sixty-four".