28251832128 has 56 divisors (see below), whose sum is σ = 80499618528. Its totient is φ = 8692870656.

The previous prime is 28251832087. The next prime is 28251832139. The reversal of 28251832128 is 82123815282.

It is a self number, because there is not a number n which added to its sum of digits gives 28251832128.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5656926 + ... + 5661917.

It is an arithmetic number, because the mean of its divisors is an integer number (1437493188).

Almost surely, 2^28251832128 is an apocalyptic number.

It is an amenable number.

28251832128 is an abundant number, since it is smaller than the sum of its proper divisors (52247786400).

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

28251832128 is a wasteful number, since it uses less digits than its factorization.

28251832128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11318871 (or 11318861 counting only the distinct ones).

The product of its digits is 122880, while the sum is 42.

The spelling of 28251832128 in words is "twenty-eight billion, two hundred fifty-one million, eight hundred thirty-two thousand, one hundred twenty-eight".