28804985136 has 60 divisors (see below), whose sum is σ = 81749388240. Its totient is φ = 9466423680.

The previous prime is 28804985129. The next prime is 28804985159. The reversal of 28804985136 is 63158940882.

28804985136 is a `hidden beast` number, since 2 + 8 + 80 + 49 + 8 + 513 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1398471 + ... + 1418918.

It is an arithmetic number, because the mean of its divisors is an integer number (1362489804).

Almost surely, 2^28804985136 is an apocalyptic number.

It is an amenable number.

28804985136 is an abundant number, since it is smaller than the sum of its proper divisors (52944403104).

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

28804985136 is a wasteful number, since it uses less digits than its factorization.

28804985136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2817474 (or 2817465 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 54.

The spelling of 28804985136 in words is "twenty-eight billion, eight hundred four million, nine hundred eighty-five thousand, one hundred thirty-six".