13889518 has 8 divisors (see below), whose sum is σ = 21068640. Its totient is φ = 6866640.

The previous prime is 13889509. The next prime is 13889531. The reversal of 13889518 is 81598831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38838 + ... + 39193.

It is an arithmetic number, because the mean of its divisors is an integer number (2633580).

Almost surely, 2^13889518 is an apocalyptic number.

13889518 is a deficient number, since it is larger than the sum of its proper divisors (7179122).

13889518 is an equidigital number, since it uses as much as digits as its factorization.

13889518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78122.

The product of its digits is 69120, while the sum is 43.

The square root of 13889518 is about 3726.8643656565. The cubic root of 13889518 is about 240.3785576707.

The spelling of 13889518 in words is "thirteen million, eight hundred eighty-nine thousand, five hundred eighteen".