28317748812 has 12 divisors (see below), whose sum is σ = 66074747256. Its totient is φ = 9439249600.

The previous prime is 28317748799. The next prime is 28317748853. The reversal of 28317748812 is 21884771382.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×28317748812² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1179906189 + ... + 1179906212.

It is an arithmetic number, because the mean of its divisors is an integer number (5506228938).

Almost surely, 2^28317748812 is an apocalyptic number.

It is an amenable number.

28317748812 is an abundant number, since it is smaller than the sum of its proper divisors (37756998444).

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

28317748812 is a wasteful number, since it uses less digits than its factorization.

28317748812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2359812408 (or 2359812406 counting only the distinct ones).

The product of its digits is 1204224, while the sum is 51.

The spelling of 28317748812 in words is "twenty-eight billion, three hundred seventeen million, seven hundred forty-eight thousand, eight hundred twelve".