28564056 has 32 divisors (see below), whose sum is σ = 79345200. Its totient is φ = 9521280.

The previous prime is 28564031. The next prime is 28564057. The reversal of 28564056 is 65046582.

28564056 is a `hidden beast` number, since 2 + 8 + 5 + 640 + 5 + 6 = 666.

It is a super-2 number, since 2×28564056² = 1631810590342272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 28564056.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28564057) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65905 + ... + 66336.

Almost surely, 2^28564056 is an apocalyptic number.

It is an amenable number.

28564056 is an abundant number, since it is smaller than the sum of its proper divisors (50781144).

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

28564056 is a wasteful number, since it uses less digits than its factorization.

28564056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132256 (or 132246 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 28564056 is about 5344.5351528454. The cubic root of 28564056 is about 305.6844112737.

The spelling of 28564056 in words is "twenty-eight million, five hundred sixty-four thousand, fifty-six".