28784680172 has 12 divisors (see below), whose sum is σ = 50559071136. Its totient is φ = 14339231280.

The previous prime is 28784680163. The next prime is 28784680193. The reversal of 28784680172 is 27108648782.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13275983 + ... + 13278150.

It is an arithmetic number, because the mean of its divisors is an integer number (4213255928).

Almost surely, 2^28784680172 is an apocalyptic number.

It is an amenable number.

28784680172 is a deficient number, since it is larger than the sum of its proper divisors (21774390964).

28784680172 is a wasteful number, since it uses less digits than its factorization.

28784680172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26554408 (or 26554406 counting only the distinct ones).

The product of its (nonzero) digits is 2408448, while the sum is 53.

The spelling of 28784680172 in words is "twenty-eight billion, seven hundred eighty-four million, six hundred eighty thousand, one hundred seventy-two".