28566844 has 12 divisors (see below), whose sum is σ = 50478064. Its totient is φ = 14144544.

The previous prime is 28566833. The next prime is 28566847. The reversal of 28566844 is 44866582.

It is a super-2 number, since 2×28566844² = 1632129152240672, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28566844.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28566847) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34257 + ... + 35080.

Almost surely, 2^28566844 is an apocalyptic number.

It is an amenable number.

28566844 is a deficient number, since it is larger than the sum of its proper divisors (21911220).

28566844 is a wasteful number, since it uses less digits than its factorization.

28566844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69444 (or 69442 counting only the distinct ones).

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

The square root of 28566844 is about 5344.7959736551. The cubic root of 28566844 is about 305.6943564114.

The spelling of 28566844 in words is "twenty-eight million, five hundred sixty-six thousand, eight hundred forty-four".