28317108872 has 64 divisors (see below), whose sum is σ = 59448211200. Its totient is φ = 12560232960.

The previous prime is 28317108851. The next prime is 28317108887. The reversal of 28317108872 is 27880171382.

It is a super-2 number, since 2×28317108872² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 236129 + ... + 335247.

It is an arithmetic number, because the mean of its divisors is an integer number (928878300).

Almost surely, 2^28317108872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28317108872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29724105600).

28317108872 is an abundant number, since it is smaller than the sum of its proper divisors (31131102328).

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

28317108872 is a wasteful number, since it uses less digits than its factorization.

28317108872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99246 (or 99242 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 47.

The spelling of 28317108872 in words is "twenty-eight billion, three hundred seventeen million, one hundred eight thousand, eight hundred seventy-two".