28636660784 has 40 divisors (see below), whose sum is σ = 58337908992. Its totient is φ = 13591223360.

The previous prime is 28636660757. The next prime is 28636660841. The reversal of 28636660784 is 48706663682.

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, 248804 + ... + 345219.

Almost surely, 2^28636660784 is an apocalyptic number.

It is an amenable number.

28636660784 is an abundant number, since it is smaller than the sum of its proper divisors (29701248208).

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

28636660784 is a wasteful number, since it uses less digits than its factorization.

28636660784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 594185 (or 594179 counting only the distinct ones).

The product of its (nonzero) digits is 13934592, while the sum is 56.

The spelling of 28636660784 in words is "twenty-eight billion, six hundred thirty-six million, six hundred sixty thousand, seven hundred eighty-four".