28813866128 has 20 divisors (see below), whose sum is σ = 55974177840. Its totient is φ = 14368917024.

The previous prime is 28813866113. The next prime is 28813866161. The reversal of 28813866128 is 82166831882.

It is a hoax number, since the sum of its digits (53) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 28813866128.

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, 2369750 + ... + 2381877.

It is an arithmetic number, because the mean of its divisors is an integer number (2798708892).

Almost surely, 2^28813866128 is an apocalyptic number.

It is an amenable number.

28813866128 is a deficient number, since it is larger than the sum of its proper divisors (27160311712).

28813866128 is a wasteful number, since it uses less digits than its factorization.

28813866128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4752014 (or 4752008 counting only the distinct ones).

The product of its digits is 1769472, while the sum is 53.

The spelling of 28813866128 in words is "twenty-eight billion, eight hundred thirteen million, eight hundred sixty-six thousand, one hundred twenty-eight".