13890879 has 16 divisors (see below), whose sum is σ = 20746240. Its totient is φ = 9185400.

The previous prime is 13890839. The next prime is 13890907. The reversal of 13890879 is 97809831.

It is not a de Polignac number, because 13890879 - 2¹² = 13886783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13890839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1404 + ... + 5454.

It is an arithmetic number, because the mean of its divisors is an integer number (1296640).

Almost surely, 2^13890879 is an apocalyptic number.

13890879 is a deficient number, since it is larger than the sum of its proper divisors (6855361).

13890879 is a wasteful number, since it uses less digits than its factorization.

13890879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4187 (or 4181 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 13890879 is about 3727.0469543594. The cubic root of 13890879 is about 240.3864087838.

The spelling of 13890879 in words is "thirteen million, eight hundred ninety thousand, eight hundred seventy-nine".