13991210 has 8 divisors (see below), whose sum is σ = 25184196. Its totient is φ = 5596480.

The previous prime is 13991203. The next prime is 13991231. The reversal of 13991210 is 1219931.

It can be written as a sum of positive squares in 2 ways, for example, as 13402921 + 588289 = 3661^2 + 767^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 13991210.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 699551 + ... + 699570.

Almost surely, 2^13991210 is an apocalyptic number.

13991210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13991210 is a deficient number, since it is larger than the sum of its proper divisors (11192986).

13991210 is a wasteful number, since it uses less digits than its factorization.

13991210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1399128.

The product of its (nonzero) digits is 486, while the sum is 26.

The square root of 13991210 is about 3740.4825891855. The cubic root of 13991210 is about 240.9637750228.

The spelling of 13991210 in words is "thirteen million, nine hundred ninety-one thousand, two hundred ten".