28311685973232 has 20 divisors (see below), whose sum is σ = 73138522097640. Its totient is φ = 9437228657728.

The previous prime is 28311685973161. The next prime is 28311685973251. The reversal of 28311685973232 is 23237958611382.

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, 294913395507 + ... + 294913395602.

It is an arithmetic number, because the mean of its divisors is an integer number (3656926104882).

Almost surely, 2^{28311685973232} is an apocalyptic number.

It is an amenable number.

28311685973232 is an abundant number, since it is smaller than the sum of its proper divisors (44826836124408).

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

28311685973232 is a wasteful number, since it uses less digits than its factorization.

28311685973232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 589826791120 (or 589826791114 counting only the distinct ones).

The product of its digits is 26127360, while the sum is 60.

The spelling of 28311685973232 in words is "twenty-eight trillion, three hundred eleven billion, six hundred eighty-five million, nine hundred seventy-three thousand, two hundred thirty-two".