28120855932 has 72 divisors (see below), whose sum is σ = 81054254736. Its totient is φ = 8143593984.

The previous prime is 28120855909. The next prime is 28120855963. The reversal of 28120855932 is 23955802182.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1759318 + ... + 1775229.

It is an arithmetic number, because the mean of its divisors is an integer number (1125753538).

Almost surely, 2^28120855932 is an apocalyptic number.

It is an amenable number.

28120855932 is an abundant number, since it is smaller than the sum of its proper divisors (52933398804).

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

28120855932 is a wasteful number, since it uses less digits than its factorization.

28120855932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3534587 (or 3534582 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The spelling of 28120855932 in words is "twenty-eight billion, one hundred twenty million, eight hundred fifty-five thousand, nine hundred thirty-two".