28287318816 has 36 divisors (see below), whose sum is σ = 80442063702. Its totient is φ = 9429106176.

The previous prime is 28287318803. The next prime is 28287318853. The reversal of 28287318816 is 61881378282.

It can be written as a sum of positive squares in only one way, i.e., 23163622416 + 5123696400 = 152196^2 + 71580^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 49109641 + ... + 49110216.

Almost surely, 2^28287318816 is an apocalyptic number.

It is an amenable number.

28287318816 is an abundant number, since it is smaller than the sum of its proper divisors (52154744886).

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

28287318816 is a wasteful number, since it uses less digits than its factorization.

28287318816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98219873 (or 98219862 counting only the distinct ones).

The product of its digits is 2064384, while the sum is 54.

The spelling of 28287318816 in words is "twenty-eight billion, two hundred eighty-seven million, three hundred eighteen thousand, eight hundred sixteen".