13981944 has 32 divisors (see below), whose sum is σ = 36162000. Its totient is φ = 4499712.

The previous prime is 13981937. The next prime is 13981951. The reversal of 13981944 is 44918931.

It is an interprime number because it is at equal distance from previous prime (13981937) and next prime (13981951).

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9349 + ... + 10740.

Almost surely, 2^13981944 is an apocalyptic number.

It is an amenable number.

13981944 is an abundant number, since it is smaller than the sum of its proper divisors (22180056).

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

13981944 is a wasteful number, since it uses less digits than its factorization.

13981944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20127 (or 20123 counting only the distinct ones).

The product of its digits is 31104, while the sum is 39.

The square root of 13981944 is about 3739.2437738131. The cubic root of 13981944 is about 240.9105686782.

The spelling of 13981944 in words is "thirteen million, nine hundred eighty-one thousand, nine hundred forty-four".