28663868926 has 16 divisors (see below), whose sum is σ = 53605157760. Its totient is φ = 11167741080.

The previous prime is 28663868903. The next prime is 28663868953. The reversal of 28663868926 is 62986836682.

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, 93064356 + ... + 93064663.

It is an arithmetic number, because the mean of its divisors is an integer number (3350322360).

Almost surely, 2^28663868926 is an apocalyptic number.

28663868926 is a deficient number, since it is larger than the sum of its proper divisors (24941288834).

28663868926 is a wasteful number, since it uses less digits than its factorization.

28663868926 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186129039.

The product of its digits is 71663616, while the sum is 64.

The spelling of 28663868926 in words is "twenty-eight billion, six hundred sixty-three million, eight hundred sixty-eight thousand, nine hundred twenty-six".