28312121364 has 24 divisors (see below), whose sum is σ = 66071929728. Its totient is φ = 9435900480.

The previous prime is 28312121359. The next prime is 28312121381. The reversal of 28312121364 is 46312121382.

It is a super-2 number, since 2×28312121364² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

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, 102652 + ... + 259155.

It is an arithmetic number, because the mean of its divisors is an integer number (2752997072).

Almost surely, 2^28312121364 is an apocalyptic number.

It is an amenable number.

28312121364 is an abundant number, since it is smaller than the sum of its proper divisors (37759808364).

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

28312121364 is a wasteful number, since it uses less digits than its factorization.

28312121364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368335 (or 368333 counting only the distinct ones).

The product of its digits is 13824, while the sum is 33.

The spelling of 28312121364 in words is "twenty-eight billion, three hundred twelve million, one hundred twenty-one thousand, three hundred sixty-four".