13870944 has 36 divisors (see below), whose sum is σ = 39446316. Its totient is φ = 4623552.

The previous prime is 13870939. The next prime is 13870951. The reversal of 13870944 is 44907831.

It is a happy number.

13870944 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×13870944² = 384806174902272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 13870899 and 13870908.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23794 + ... + 24369.

It is an arithmetic number, because the mean of its divisors is an integer number (1095731).

Almost surely, 2^13870944 is an apocalyptic number.

It is an amenable number.

13870944 is an abundant number, since it is smaller than the sum of its proper divisors (25575372).

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

13870944 is a wasteful number, since it uses less digits than its factorization.

13870944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48179 (or 48168 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 13870944 is about 3724.3716248516. The cubic root of 13870944 is about 240.2713597339.

The spelling of 13870944 in words is "thirteen million, eight hundred seventy thousand, nine hundred forty-four".