13891958 has 16 divisors (see below), whose sum is σ = 22135680. Its totient is φ = 6516096.

The previous prime is 13891949. The next prime is 13891961. The reversal of 13891958 is 85919831.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15860 + ... + 16712.

It is an arithmetic number, because the mean of its divisors is an integer number (1383480).

Almost surely, 2^13891958 is an apocalyptic number.

13891958 is a deficient number, since it is larger than the sum of its proper divisors (8243722).

13891958 is a wasteful number, since it uses less digits than its factorization.

13891958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1351.

The product of its digits is 77760, while the sum is 44.

The square root of 13891958 is about 3727.1917042191. The cubic root of 13891958 is about 240.3926327773.

The spelling of 13891958 in words is "thirteen million, eight hundred ninety-one thousand, nine hundred fifty-eight".