28684648683 has 12 divisors (see below), whose sum is σ = 41594604168. Its totient is φ = 19048688640.

The previous prime is 28684648583. The next prime is 28684648717. The reversal of 28684648683 is 38684648682.

It is a happy number.

It is not a de Polignac number, because 28684648683 - 2²⁸ = 28416213227 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28684648683.

It is not an unprimeable number, because it can be changed into a prime (28684648583) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 6198433 + ... + 6203058.

It is an arithmetic number, because the mean of its divisors is an integer number (3466217014).

Almost surely, 2^28684648683 is an apocalyptic number.

28684648683 is a deficient number, since it is larger than the sum of its proper divisors (12909955485).

28684648683 is a wasteful number, since it uses less digits than its factorization.

28684648683 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12401754 (or 12401751 counting only the distinct ones).

The product of its digits is 84934656, while the sum is 63.

Subtracting 28684648683 from its reverse (38684648682), we obtain a palindrome (9999999999).

The spelling of 28684648683 in words is "twenty-eight billion, six hundred eighty-four million, six hundred forty-eight thousand, six hundred eighty-three".