13889928 has 32 divisors (see below), whose sum is σ = 37396800. Its totient is φ = 4273728.

The previous prime is 13889921. The next prime is 13889933. The reversal of 13889928 is 82998831.

It is a happy number.

13889928 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (13889921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21948 + ... + 22571.

It is an arithmetic number, because the mean of its divisors is an integer number (1168650).

Almost surely, 2^13889928 is an apocalyptic number.

It is an amenable number.

13889928 is an abundant number, since it is smaller than the sum of its proper divisors (23506872).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13889928 is a wasteful number, since it uses less digits than its factorization.

13889928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44541 (or 44537 counting only the distinct ones).

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

The square root of 13889928 is about 3726.9193712770. The cubic root of 13889928 is about 240.3809228653.

The spelling of 13889928 in words is "thirteen million, eight hundred eighty-nine thousand, nine hundred twenty-eight".