13688191928 has 8 divisors (see below), whose sum is σ = 25665359880. Its totient is φ = 6844095960.

The previous prime is 13688191919. The next prime is 13688191931. The reversal of 13688191928 is 82919188631.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 855511988 + ... + 855512003.

It is an arithmetic number, because the mean of its divisors is an integer number (3208169985).

Almost surely, 2^13688191928 is an apocalyptic number.

It is an amenable number.

13688191928 is a deficient number, since it is larger than the sum of its proper divisors (11977167952).

13688191928 is a wasteful number, since it uses less digits than its factorization.

13688191928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1711023997 (or 1711023993 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 56.

The spelling of 13688191928 in words is "thirteen billion, six hundred eighty-eight million, one hundred ninety-one thousand, nine hundred twenty-eight".