28975793128 has 16 divisors (see below), whose sum is σ = 55797980580. Its totient is φ = 14096331648.

The previous prime is 28975793071. The next prime is 28975793131. The reversal of 28975793128 is 82139757982.

It can be written as a sum of positive squares in 2 ways, for example, as 28831360804 + 144432324 = 169798^2 + 12018^2 .

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, 48945301 + ... + 48945892.

Almost surely, 2^28975793128 is an apocalyptic number.

It is an amenable number.

28975793128 is a deficient number, since it is larger than the sum of its proper divisors (26822187452).

28975793128 is a wasteful number, since it uses less digits than its factorization.

28975793128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97891236 (or 97891232 counting only the distinct ones).

The product of its digits is 15240960, while the sum is 61.

The spelling of 28975793128 in words is "twenty-eight billion, nine hundred seventy-five million, seven hundred ninety-three thousand, one hundred twenty-eight".