28268607686085 has 96 divisors (see below), whose sum is σ = 56784484926720. Its totient is φ = 13311772201728.

The previous prime is 28268607686017. The next prime is 28268607686149. The reversal of 28268607686085 is 58068670686282.

28268607686085 is a `hidden beast` number, since 2 + 8 + 2 + 6 + 8 + 6 + 0 + 7 + 6 + 8 + 608 + 5 = 666.

It is not a de Polignac number, because 28268607686085 - 2¹⁸ = 28268607423941 is a prime.

It is a super-2 number, since 2×28268607686085² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 26410822 + ... + 27460311.

It is an arithmetic number, because the mean of its divisors is an integer number (591505051320).

Almost surely, 2^{28268607686085} is an apocalyptic number.

It is an amenable number.

28268607686085 is an abundant number, since it is smaller than the sum of its proper divisors (28515877240635).

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

28268607686085 is a wasteful number, since it uses less digits than its factorization.

28268607686085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53871196 (or 53871177 counting only the distinct ones).

The product of its (nonzero) digits is 743178240, while the sum is 72.

The spelling of 28268607686085 in words is "twenty-eight trillion, two hundred sixty-eight billion, six hundred seven million, six hundred eighty-six thousand, eighty-five".