13928278 has 32 divisors (see below), whose sum is σ = 25998336. Its totient is φ = 5449248.

The previous prime is 13928263. The next prime is 13928281. The reversal of 13928278 is 87282931.

13928278 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 13928278.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18375 + ... + 19117.

It is an arithmetic number, because the mean of its divisors is an integer number (812448).

Almost surely, 2^13928278 is an apocalyptic number.

13928278 is a deficient number, since it is larger than the sum of its proper divisors (12070058).

13928278 is a wasteful number, since it uses less digits than its factorization.

13928278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 868.

The product of its digits is 48384, while the sum is 40.

The square root of 13928278 is about 3732.0608247991. The cubic root of 13928278 is about 240.6019496220.

The spelling of 13928278 in words is "thirteen million, nine hundred twenty-eight thousand, two hundred seventy-eight".