28700230656 has 44 divisors (see below), whose sum is σ = 76496586512. Its totient is φ = 9566742528.

The previous prime is 28700230649. The next prime is 28700230679. The reversal of 28700230656 is 65603200782.

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, 4668190 + ... + 4674333.

Almost surely, 2^28700230656 is an apocalyptic number.

It is an amenable number.

28700230656 is an abundant number, since it is smaller than the sum of its proper divisors (47796355856).

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

28700230656 is an equidigital number, since it uses as much as digits as its factorization.

28700230656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9342546 (or 9342528 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 39.

The spelling of 28700230656 in words is "twenty-eight billion, seven hundred million, two hundred thirty thousand, six hundred fifty-six".