13991068 has 108 divisors (see below), whose sum is σ = 34298040. Its totient is φ = 4935168.

The previous prime is 13991063. The next prime is 13991071. The reversal of 13991068 is 86019931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13991063) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 736363 + ... + 736381.

Almost surely, 2^13991068 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13991068, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17149020).

13991068 is an abundant number, since it is smaller than the sum of its proper divisors (20306972).

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

13991068 is a wasteful number, since it uses less digits than its factorization.

13991068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84 (or 58 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 13991068 is about 3740.4636076294. The cubic root of 13991068 is about 240.9629598211.

The spelling of 13991068 in words is "thirteen million, nine hundred ninety-one thousand, sixty-eight".