28517659896 has 32 divisors (see below), whose sum is σ = 77775436800. Its totient is φ = 8641715040.

The previous prime is 28517659871. The next prime is 28517659931. The reversal of 28517659896 is 69895671582.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54010456 + ... + 54010983.

It is an arithmetic number, because the mean of its divisors is an integer number (2430482400).

Almost surely, 2^28517659896 is an apocalyptic number.

It is an amenable number.

28517659896 is an abundant number, since it is smaller than the sum of its proper divisors (49257776904).

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

28517659896 is a wasteful number, since it uses less digits than its factorization.

28517659896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108021459 (or 108021455 counting only the distinct ones).

The product of its digits is 65318400, while the sum is 66.

The spelling of 28517659896 in words is "twenty-eight billion, five hundred seventeen million, six hundred fifty-nine thousand, eight hundred ninety-six".