13981344 has 96 divisors (see below), whose sum is σ = 41912640. Its totient is φ = 4042752.

The previous prime is 13981339. The next prime is 13981349. The reversal of 13981344 is 44318931.

It is an interprime number because it is at equal distance from previous prime (13981339) and next prime (13981349).

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (13981349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20887 + ... + 21545.

It is an arithmetic number, because the mean of its divisors is an integer number (436590).

Almost surely, 2^13981344 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 13981344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20956320).

13981344 is an abundant number, since it is smaller than the sum of its proper divisors (27931296).

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

13981344 is a wasteful number, since it uses less digits than its factorization.

13981344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702 (or 694 counting only the distinct ones).

The product of its digits is 10368, while the sum is 33.

The square root of 13981344 is about 3739.1635428261. The cubic root of 13981344 is about 240.9071226049.

The spelling of 13981344 in words is "thirteen million, nine hundred eighty-one thousand, three hundred forty-four".