28544564 has 24 divisors (see below), whose sum is σ = 55194048. Its totient is φ = 12848000.

The previous prime is 28544543. The next prime is 28544599. The reversal of 28544564 is 46544582.

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 7 ways as a sum of consecutive naturals, for example, 7562 + ... + 10689.

It is an arithmetic number, because the mean of its divisors is an integer number (2299752).

Almost surely, 2^28544564 is an apocalyptic number.

It is an amenable number.

28544564 is a deficient number, since it is larger than the sum of its proper divisors (26649484).

28544564 is a wasteful number, since it uses less digits than its factorization.

28544564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18295 (or 18293 counting only the distinct ones).

The product of its digits is 153600, while the sum is 38.

The square root of 28544564 is about 5342.7112967107. The cubic root of 28544564 is about 305.6148628362.

The spelling of 28544564 in words is "twenty-eight million, five hundred forty-four thousand, five hundred sixty-four".