28117232816 has 20 divisors (see below), whose sum is σ = 54519052224. Its totient is φ = 14047800000.

The previous prime is 28117232791. The next prime is 28117232833. The reversal of 28117232816 is 61823271182.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 654560 + ... + 696191.

Almost surely, 2^28117232816 is an apocalyptic number.

It is an amenable number.

28117232816 is a deficient number, since it is larger than the sum of its proper divisors (26401819408).

28117232816 is a wasteful number, since it uses less digits than its factorization.

28117232816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1352060 (or 1352054 counting only the distinct ones).

The product of its digits is 64512, while the sum is 41.

The spelling of 28117232816 in words is "twenty-eight billion, one hundred seventeen million, two hundred thirty-two thousand, eight hundred sixteen".