28131626812 has 24 divisors (see below), whose sum is σ = 49340455472. Its totient is φ = 14034384000.

The previous prime is 28131626791. The next prime is 28131626827. The reversal of 28131626812 is 21862613182.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6694312 + ... + 6698512.

Almost surely, 2^28131626812 is an apocalyptic number.

It is an amenable number.

28131626812 is a deficient number, since it is larger than the sum of its proper divisors (21208828660).

28131626812 is a wasteful number, since it uses less digits than its factorization.

28131626812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7549 (or 7547 counting only the distinct ones).

The product of its digits is 55296, while the sum is 40.

The spelling of 28131626812 in words is "twenty-eight billion, one hundred thirty-one million, six hundred twenty-six thousand, eight hundred twelve".