13928889 has 32 divisors (see below), whose sum is σ = 21224448. Its totient is φ = 8064000.

The previous prime is 13928867. The next prime is 13928891. The reversal of 13928889 is 98882931.

It is a happy number.

13928889 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 13928889 - 2⁸ = 13928633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13928989) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49429 + ... + 49709.

It is an arithmetic number, because the mean of its divisors is an integer number (663264).

Almost surely, 2^13928889 is an apocalyptic number.

It is an amenable number.

13928889 is a deficient number, since it is larger than the sum of its proper divisors (7295559).

13928889 is a wasteful number, since it uses less digits than its factorization.

13928889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369.

The product of its digits is 248832, while the sum is 48.

The square root of 13928889 is about 3732.1426821599. The cubic root of 13928889 is about 240.6054677798.

The spelling of 13928889 in words is "thirteen million, nine hundred twenty-eight thousand, eight hundred eighty-nine".