13998686 has 8 divisors (see below), whose sum is σ = 22613304. Its totient is φ = 6460920.

The previous prime is 13998679. The next prime is 13998689. The reversal of 13998686 is 68689931.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13998689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 269180 + ... + 269231.

It is an arithmetic number, because the mean of its divisors is an integer number (2826663).

Almost surely, 2^13998686 is an apocalyptic number.

13998686 is a deficient number, since it is larger than the sum of its proper divisors (8614618).

13998686 is a wasteful number, since it uses less digits than its factorization.

13998686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538426.

The product of its digits is 559872, while the sum is 50.

The square root of 13998686 is about 3741.4817920177. The cubic root of 13998686 is about 241.0066858794.

The spelling of 13998686 in words is "thirteen million, nine hundred ninety-eight thousand, six hundred eighty-six".