13720944 has 40 divisors (see below), whose sum is σ = 36671760. Its totient is φ = 4415488.

The previous prime is 13720933. The next prime is 13721033. The reversal of 13720944 is 44902731.

It is a happy number.

13720944 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×13720944² = 376528608502272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3537 + ... + 6320.

It is an arithmetic number, because the mean of its divisors is an integer number (916794).

Almost surely, 2^13720944 is an apocalyptic number.

It is an amenable number.

13720944 is an abundant number, since it is smaller than the sum of its proper divisors (22950816).

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

13720944 is a wasteful number, since it uses less digits than its factorization.

13720944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9897 (or 9891 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 13720944 is about 3704.1792613209. The cubic root of 13720944 is about 239.4021229438.

The spelling of 13720944 in words is "thirteen million, seven hundred twenty thousand, nine hundred forty-four".