28564844 has 36 divisors (see below), whose sum is σ = 63441000. Its totient is φ = 11128320.

The previous prime is 28564819. The next prime is 28564871. The reversal of 28564844 is 44846582.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4469 + ... + 8780.

It is an arithmetic number, because the mean of its divisors is an integer number (1762250).

Almost surely, 2^28564844 is an apocalyptic number.

It is an amenable number.

28564844 is an abundant number, since it is smaller than the sum of its proper divisors (34876156).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28564844 is a wasteful number, since it uses less digits than its factorization.

28564844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13278 (or 13269 counting only the distinct ones).

The product of its digits is 245760, while the sum is 41.

The square root of 28564844 is about 5344.6088724995. The cubic root of 28564844 is about 305.6872222319.

The spelling of 28564844 in words is "twenty-eight million, five hundred sixty-four thousand, eight hundred forty-four".