28931107996 has 24 divisors (see below), whose sum is σ = 57871794176. Its totient is φ = 12396993840.

The previous prime is 28931107991. The next prime is 28931108033. The reversal of 28931107996 is 69970113982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28931107991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93205 + ... + 257971.

Almost surely, 2^28931107996 is an apocalyptic number.

It is an amenable number.

28931107996 is an abundant number, since it is smaller than the sum of its proper divisors (28940686180).

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

28931107996 is a wasteful number, since it uses less digits than its factorization.

28931107996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171049 (or 171047 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 55.

The spelling of 28931107996 in words is "twenty-eight billion, nine hundred thirty-one million, one hundred seven thousand, nine hundred ninety-six".