13991370 has 32 divisors (see below), whose sum is σ = 33704640. Its totient is φ = 3717120.

The previous prime is 13991363. The next prime is 13991371. The reversal of 13991370 is 7319931.

It is not an unprimeable number, because it can be changed into a prime (13991371) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9226 + ... + 10634.

It is an arithmetic number, because the mean of its divisors is an integer number (1053270).

Almost surely, 2^13991370 is an apocalyptic number.

13991370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13991370 is an abundant number, since it is smaller than the sum of its proper divisors (19713270).

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

13991370 is a wasteful number, since it uses less digits than its factorization.

13991370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1750.

The product of its (nonzero) digits is 5103, while the sum is 33.

The square root of 13991370 is about 3740.5039767390. The cubic root of 13991370 is about 240.9646935532.

The spelling of 13991370 in words is "thirteen million, nine hundred ninety-one thousand, three hundred seventy".