28331964272 has 20 divisors (see below), whose sum is σ = 55132896120. Its totient is φ = 14104120128.

The previous prime is 28331964191. The next prime is 28331964281. The reversal of 28331964272 is 27246913382.

It is a congruent number.

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, 3862598 + ... + 3869925.

It is an arithmetic number, because the mean of its divisors is an integer number (2756644806).

Almost surely, 2^28331964272 is an apocalyptic number.

It is an amenable number.

28331964272 is a deficient number, since it is larger than the sum of its proper divisors (26800931848).

28331964272 is a wasteful number, since it uses less digits than its factorization.

28331964272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7732760 (or 7732754 counting only the distinct ones).

The product of its digits is 870912, while the sum is 47.

The spelling of 28331964272 in words is "twenty-eight billion, three hundred thirty-one million, nine hundred sixty-four thousand, two hundred seventy-two".