13991152 has 40 divisors (see below), whose sum is σ = 31578336. Its totient is φ = 5880576.

The previous prime is 13991147. The next prime is 13991167. The reversal of 13991152 is 25119931.

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, 4758 + ... + 7114.

Almost surely, 2^13991152 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 13991152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15789168).

13991152 is an abundant number, since it is smaller than the sum of its proper divisors (17587184).

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

13991152 is a wasteful number, since it uses less digits than its factorization.

13991152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2425 (or 2419 counting only the distinct ones).

The product of its digits is 2430, while the sum is 31.

The square root of 13991152 is about 3740.4748361672. The cubic root of 13991152 is about 240.9634420537.

The spelling of 13991152 in words is "thirteen million, nine hundred ninety-one thousand, one hundred fifty-two".