13928 has 8 divisors (see below), whose sum is σ = 26130. Its totient is φ = 6960.

The previous prime is 13921. The next prime is 13931. The reversal of 13928 is 82931.

13928 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 13924 + 4 = 118^2 + 2^2 .

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

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (13921) by changing a digit.

13928 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 863 + ... + 878.

It is an amenable number.

13928 is a deficient number, since it is larger than the sum of its proper divisors (12202).

13928 is a wasteful number, since it uses less digits than its factorization.

13928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1747 (or 1743 counting only the distinct ones).

The product of its digits is 432, while the sum is 23.

The square root of 13928 is about 118.0169479355. The cubic root of 13928 is about 24.0600348855.

The spelling of 13928 in words is "thirteen thousand, nine hundred twenty-eight".