28699556832 has 72 divisors (see below), whose sum is σ = 81633333600. Its totient is φ = 9564295680.

The previous prime is 28699556813. The next prime is 28699556849. The reversal of 28699556832 is 23865599682.

28699556832 is a `hidden beast` number, since 2 + 8 + 69 + 9 + 5 + 568 + 3 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a self number, because there is not a number n which added to its sum of digits gives 28699556832.

It is a congruent number.

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, 1636044 + ... + 1653492.

It is an arithmetic number, because the mean of its divisors is an integer number (1133796300).

Almost surely, 2^28699556832 is an apocalyptic number.

It is an amenable number.

28699556832 is an abundant number, since it is smaller than the sum of its proper divisors (52933776768).

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

28699556832 is a wasteful number, since it uses less digits than its factorization.

28699556832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23176 (or 23165 counting only the distinct ones).

The product of its digits is 55987200, while the sum is 63.

The spelling of 28699556832 in words is "twenty-eight billion, six hundred ninety-nine million, five hundred fifty-six thousand, eight hundred thirty-two".