13991100 has 72 divisors (see below), whose sum is σ = 40882800. Its totient is φ = 3694080.

The previous prime is 13991077. The next prime is 13991123. The reversal of 13991100 is 119931.

It is an interprime number because it is at equal distance from previous prime (13991077) and next prime (13991123).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44544 + ... + 44856.

Almost surely, 2^13991100 is an apocalyptic number.

13991100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13991100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20441400).

13991100 is an abundant number, since it is smaller than the sum of its proper divisors (26891700).

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

13991100 is a wasteful number, since it uses less digits than its factorization.

13991100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479 (or 472 counting only the distinct ones).

The product of its (nonzero) digits is 243, while the sum is 24.

The square root of 13991100 is about 3740.4678851716. The cubic root of 13991100 is about 240.9631435290.

The spelling of 13991100 in words is "thirteen million, nine hundred ninety-one thousand, one hundred".