13243986 has 96 divisors (see below), whose sum is σ = 36167040. Its totient is φ = 3545856.

The previous prime is 13243973. The next prime is 13243991. The reversal of 13243986 is 68934231.

It is a self number, because there is not a number n which added to its sum of digits gives 13243986.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 57720 + ... + 57948.

It is an arithmetic number, because the mean of its divisors is an integer number (376740).

Almost surely, 2^13243986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13243986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18083520).

13243986 is an abundant number, since it is smaller than the sum of its proper divisors (22923054).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13243986 is a wasteful number, since it uses less digits than its factorization.

13243986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270 (or 258 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 13243986 is about 3639.2287644500. The cubic root of 13243986 is about 236.5953678853.

The spelling of 13243986 in words is "thirteen million, two hundred forty-three thousand, nine hundred eighty-six".