28756832480 has 24 divisors (see below), whose sum is σ = 67938017112. Its totient is φ = 11502732928.

The previous prime is 28756832479. The next prime is 28756832497. The reversal of 28756832480 is 8423865782.

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, 89864942 + ... + 89865261.

It is an arithmetic number, because the mean of its divisors is an integer number (2830750713).

Almost surely, 2^28756832480 is an apocalyptic number.

28756832480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28756832480 is an abundant number, since it is smaller than the sum of its proper divisors (39181184632).

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

28756832480 is a wasteful number, since it uses less digits than its factorization.

28756832480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179730218 (or 179730210 counting only the distinct ones).

The product of its (nonzero) digits is 5160960, while the sum is 53.

The spelling of 28756832480 in words is "twenty-eight billion, seven hundred fifty-six million, eight hundred thirty-two thousand, four hundred eighty".