28686122874 has 48 divisors (see below), whose sum is σ = 62425011168. Its totient is φ = 9520320096.

The previous prime is 28686122869. The next prime is 28686122887. The reversal of 28686122874 is 47822168682.

28686122874 is a `hidden beast` number, since 286 + 86 + 1 + 2 + 287 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 28686122874.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4725189 + ... + 4731255.

It is an arithmetic number, because the mean of its divisors is an integer number (1300521066).

Almost surely, 2^28686122874 is an apocalyptic number.

28686122874 is an abundant number, since it is smaller than the sum of its proper divisors (33738888294).

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

28686122874 is a wasteful number, since it uses less digits than its factorization.

28686122874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7179 (or 7176 counting only the distinct ones).

The product of its digits is 4128768, while the sum is 54.

The spelling of 28686122874 in words is "twenty-eight billion, six hundred eighty-six million, one hundred twenty-two thousand, eight hundred seventy-four".