13928691 has 24 divisors (see below), whose sum is σ = 22745280. Its totient is φ = 7538832.

The previous prime is 13928683. The next prime is 13928701. The reversal of 13928691 is 19682931.

13928691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13928691 - 2³ = 13928683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13928611) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 300 + ... + 5286.

It is an arithmetic number, because the mean of its divisors is an integer number (947720).

Almost surely, 2^13928691 is an apocalyptic number.

13928691 is a deficient number, since it is larger than the sum of its proper divisors (8816589).

13928691 is a wasteful number, since it uses less digits than its factorization.

13928691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5023 (or 5016 counting only the distinct ones).

The product of its digits is 23328, while the sum is 39.

The square root of 13928691 is about 3732.1161557486. The cubic root of 13928691 is about 240.6043277007.

The spelling of 13928691 in words is "thirteen million, nine hundred twenty-eight thousand, six hundred ninety-one".