28667608432 has 40 divisors (see below), whose sum is σ = 55767336912. Its totient is φ = 14276121600.

The previous prime is 28667608397. The next prime is 28667608433. The reversal of 28667608432 is 23480676682.

It is a self number, because there is not a number n which added to its sum of digits gives 28667608432.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28667608433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9183832 + ... + 9186952.

Almost surely, 2^28667608432 is an apocalyptic number.

It is an amenable number.

28667608432 is a deficient number, since it is larger than the sum of its proper divisors (27099728480).

28667608432 is a wasteful number, since it uses less digits than its factorization.

28667608432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5257 (or 5251 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 52.

The spelling of 28667608432 in words is "twenty-eight billion, six hundred sixty-seven million, six hundred eight thousand, four hundred thirty-two".