28566243872 has 24 divisors (see below), whose sum is σ = 56243580876. Its totient is φ = 14282159872.

The previous prime is 28566243863. The next prime is 28566243889. The reversal of 28566243872 is 27834266582.

It can be written as a sum of positive squares in 2 ways, for example, as 28024099216 + 542144656 = 167404^2 + 23284^2 .

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, 838238 + ... + 871650.

Almost surely, 2^28566243872 is an apocalyptic number.

It is an amenable number.

28566243872 is a deficient number, since it is larger than the sum of its proper divisors (27677337004).

28566243872 is a wasteful number, since it uses less digits than its factorization.

28566243872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60140 (or 60132 counting only the distinct ones).

The product of its digits is 7741440, while the sum is 53.

The spelling of 28566243872 in words is "twenty-eight billion, five hundred sixty-six million, two hundred forty-three thousand, eight hundred seventy-two".