28856631735 has 12 divisors (see below), whose sum is σ = 50018161752. Its totient is φ = 15390203568.

The previous prime is 28856631733. The next prime is 28856631751. The reversal of 28856631735 is 53713665882.

28856631735 is a `hidden beast` number, since 2 + 8 + 8 + 566 + 3 + 1 + 73 + 5 = 666.

It is not a de Polignac number, because 28856631735 - 2¹ = 28856631733 is a prime.

It is a super-2 number, since 2×28856631735² (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 (28856631731) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 320629197 + ... + 320629286.

It is an arithmetic number, because the mean of its divisors is an integer number (4168180146).

Almost surely, 2^28856631735 is an apocalyptic number.

28856631735 is a deficient number, since it is larger than the sum of its proper divisors (21161530017).

28856631735 is a wasteful number, since it uses less digits than its factorization.

28856631735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641258494 (or 641258491 counting only the distinct ones).

The product of its digits is 7257600, while the sum is 54.

The spelling of 28856631735 in words is "twenty-eight billion, eight hundred fifty-six million, six hundred thirty-one thousand, seven hundred thirty-five".