28456864 has 24 divisors (see below), whose sum is σ = 56554848. Its totient is φ = 14093760.

The previous prime is 28456837. The next prime is 28456873. The reversal of 28456864 is 46865482.

It is a self number, because there is not a number n which added to its sum of digits gives 28456864.

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, 732 + ... + 7579.

It is an arithmetic number, because the mean of its divisors is an integer number (2356452).

Almost surely, 2^28456864 is an apocalyptic number.

It is an amenable number.

28456864 is a deficient number, since it is larger than the sum of its proper divisors (28097984).

28456864 is a wasteful number, since it uses less digits than its factorization.

28456864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8428 (or 8420 counting only the distinct ones).

The product of its digits is 368640, while the sum is 43.

The square root of 28456864 is about 5334.4975396001. The cubic root of 28456864 is about 305.3015525147.

The spelling of 28456864 in words is "twenty-eight million, four hundred fifty-six thousand, eight hundred sixty-four".