28634005872 has 40 divisors (see below), whose sum is σ = 82190203280. Its totient is φ = 9544668480.

The previous prime is 28634005843. The next prime is 28634005891. The reversal of 28634005872 is 27850043682.

28634005872 is a `hidden beast` number, since 2 + 8 + 63 + 4 + 0 + 0 + 587 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33140779 + ... + 33141642.

It is an arithmetic number, because the mean of its divisors is an integer number (2054755082).

Almost surely, 2^28634005872 is an apocalyptic number.

It is an amenable number.

28634005872 is an abundant number, since it is smaller than the sum of its proper divisors (53556197408).

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

28634005872 is a wasteful number, since it uses less digits than its factorization.

28634005872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66282438 (or 66282426 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The spelling of 28634005872 in words is "twenty-eight billion, six hundred thirty-four million, five thousand, eight hundred seventy-two".