28338882564 has 24 divisors (see below), whose sum is σ = 70013710368. Its totient is φ = 8890629760.

The previous prime is 28338882553. The next prime is 28338882577. The reversal of 28338882564 is 46528883382.

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, 69457842 + ... + 69458249.

It is an arithmetic number, because the mean of its divisors is an integer number (2917237932).

Almost surely, 2^28338882564 is an apocalyptic number.

It is an amenable number.

28338882564 is an abundant number, since it is smaller than the sum of its proper divisors (41674827804).

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

28338882564 is a wasteful number, since it uses less digits than its factorization.

28338882564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138916115 (or 138916113 counting only the distinct ones).

The product of its digits is 17694720, while the sum is 57.

The spelling of 28338882564 in words is "twenty-eight billion, three hundred thirty-eight million, eight hundred eighty-two thousand, five hundred sixty-four".