13929928 has 8 divisors (see below), whose sum is σ = 26118630. Its totient is φ = 6964960.

The previous prime is 13929913. The next prime is 13929961. The reversal of 13929928 is 82992931.

It can be written as a sum of positive squares in only one way, i.e., 12802084 + 1127844 = 3578^2 + 1062^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 870613 + ... + 870628.

Almost surely, 2^13929928 is an apocalyptic number.

It is an amenable number.

13929928 is a deficient number, since it is larger than the sum of its proper divisors (12188702).

13929928 is a wasteful number, since it uses less digits than its factorization.

13929928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1741247 (or 1741243 counting only the distinct ones).

The product of its digits is 69984, while the sum is 43.

The square root of 13929928 is about 3732.2818757430. The cubic root of 13929928 is about 240.6114501394.

The spelling of 13929928 in words is "thirteen million, nine hundred twenty-nine thousand, nine hundred twenty-eight".