28317608631 has 24 divisors (see below), whose sum is σ = 44653046256. Its totient is φ = 17187500160.

The previous prime is 28317608603. The next prime is 28317608651. The reversal of 28317608631 is 13680671382.

28317608631 is a `hidden beast` number, since 2 + 8 + 3 + 1 + 7 + 6 + 0 + 8 + 631 = 666.

It is not a de Polignac number, because 28317608631 - 2²¹ = 28315511479 is a prime.

It is a super-2 number, since 2×28317608631² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28317608651) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1649205 + ... + 1666286.

It is an arithmetic number, because the mean of its divisors is an integer number (1860543594).

Almost surely, 2^28317608631 is an apocalyptic number.

28317608631 is a deficient number, since it is larger than the sum of its proper divisors (16335437625).

28317608631 is a wasteful number, since it uses less digits than its factorization.

28317608631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3315583 (or 3315580 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The spelling of 28317608631 in words is "twenty-eight billion, three hundred seventeen million, six hundred eight thousand, six hundred thirty-one".