28509898116 has 24 divisors (see below), whose sum is σ = 76026395200. Its totient is φ = 8145685152.

The previous prime is 28509898111. The next prime is 28509898169. The reversal of 28509898116 is 61189890582.

It is not an unprimeable number, because it can be changed into a prime (28509898111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169701691 + ... + 169701858.

Almost surely, 2^28509898116 is an apocalyptic number.

It is an amenable number.

28509898116 is an abundant number, since it is smaller than the sum of its proper divisors (47516497084).

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

28509898116 is a wasteful number, since it uses less digits than its factorization.

28509898116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339403563 (or 339403561 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 57.

The spelling of 28509898116 in words is "twenty-eight billion, five hundred nine million, eight hundred ninety-eight thousand, one hundred sixteen".