28673538836 has 12 divisors (see below), whose sum is σ = 50271448500. Its totient is φ = 14310267840.

The previous prime is 28673538791. The next prime is 28673538841. The reversal of 28673538836 is 63883537682.

It can be written as a sum of positive squares in 2 ways, for example, as 5005562500 + 23667976336 = 70750^2 + 153844^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6622961 + ... + 6627288.

It is an arithmetic number, because the mean of its divisors is an integer number (4189287375).

Almost surely, 2^28673538836 is an apocalyptic number.

It is an amenable number.

28673538836 is a deficient number, since it is larger than the sum of its proper divisors (21597909664).

28673538836 is a wasteful number, since it uses less digits than its factorization.

28673538836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13250794 (or 13250792 counting only the distinct ones).

The product of its digits is 34836480, while the sum is 59.

The spelling of 28673538836 in words is "twenty-eight billion, six hundred seventy-three million, five hundred thirty-eight thousand, eight hundred thirty-six".