28756169632 has 12 divisors (see below), whose sum is σ = 56613709026. Its totient is φ = 14378084800.

The previous prime is 28756169627. The next prime is 28756169707. The reversal of 28756169632 is 23696165782.

It can be written as a sum of positive squares in only one way, i.e., 18691264656 + 10064904976 = 136716^2 + 100324^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 449315119 + ... + 449315182.

Almost surely, 2^28756169632 is an apocalyptic number.

It is an amenable number.

28756169632 is a deficient number, since it is larger than the sum of its proper divisors (27857539394).

28756169632 is an equidigital number, since it uses as much as digits as its factorization.

28756169632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 898630311 (or 898630303 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 55.

The spelling of 28756169632 in words is "twenty-eight billion, seven hundred fifty-six million, one hundred sixty-nine thousand, six hundred thirty-two".