28272789868 has 24 divisors (see below), whose sum is σ = 52815006720. Its totient is φ = 13203746640.

The previous prime is 28272789851. The next prime is 28272789871. The reversal of 28272789868 is 86898727282.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2614396 + ... + 2625187.

It is an arithmetic number, because the mean of its divisors is an integer number (2200625280).

Almost surely, 2^28272789868 is an apocalyptic number.

It is an amenable number.

28272789868 is a deficient number, since it is larger than the sum of its proper divisors (24542216852).

28272789868 is a wasteful number, since it uses less digits than its factorization.

28272789868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5239677 (or 5239675 counting only the distinct ones).

The product of its digits is 86704128, while the sum is 67.

The spelling of 28272789868 in words is "twenty-eight billion, two hundred seventy-two million, seven hundred eighty-nine thousand, eight hundred sixty-eight".