13807944 has 96 divisors (see below), whose sum is σ = 41067000. Its totient is φ = 4171776.

The previous prime is 13807909. The next prime is 13807949. The reversal of 13807944 is 44970831.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 11985444 + 1822500 = 3462^2 + 1350^2 .

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 = 13807899 and 13807908.

It is not an unprimeable number, because it can be changed into a prime (13807949) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35302 + ... + 35690.

Almost surely, 2^13807944 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 13807944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20533500).

13807944 is an abundant number, since it is smaller than the sum of its proper divisors (27259056).

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

13807944 is a wasteful number, since it uses less digits than its factorization.

13807944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447 (or 440 counting only the distinct ones).

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

The square root of 13807944 is about 3715.9041968275. The cubic root of 13807944 is about 239.9070473372.

The spelling of 13807944 in words is "thirteen million, eight hundred seven thousand, nine hundred forty-four".