28315375728 has 40 divisors (see below), whose sum is σ = 73279448208. Its totient is φ = 9421504512.

The previous prime is 28315375709. The next prime is 28315375807. The reversal of 28315375728 is 82757351382.

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, 502801 + ... + 556272.

Almost surely, 2^28315375728 is an apocalyptic number.

It is an amenable number.

28315375728 is an abundant number, since it is smaller than the sum of its proper divisors (44964072480).

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

28315375728 is a wasteful number, since it uses less digits than its factorization.

28315375728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1059641 (or 1059635 counting only the distinct ones).

The product of its digits is 2822400, while the sum is 51.

The spelling of 28315375728 in words is "twenty-eight billion, three hundred fifteen million, three hundred seventy-five thousand, seven hundred twenty-eight".