15944 has 8 divisors (see below), whose sum is σ = 29910. Its totient is φ = 7968.

The previous prime is 15937. The next prime is 15959. The reversal of 15944 is 44951.

It is a happy number.

15944 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 12100 + 3844 = 110^2 + 62^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×15944² = 508422272, which contains 22 as substring.

It is a plaindrome in base 15.

It is an unprimeable number.

15944 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 989 + ... + 1004.

2¹⁵⁹⁴⁴ is an apocalyptic number.

It is an amenable number.

15944 is a deficient number, since it is larger than the sum of its proper divisors (13966).

15944 is a wasteful number, since it uses less digits than its factorization.

15944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1999 (or 1995 counting only the distinct ones).

The product of its digits is 720, while the sum is 23.

The square root of 15944 is about 126.2695529413. The cubic root of 15944 is about 25.1689884754.

It can be divided in two parts, 159 and 44, that multiplied together give a palindrome (6996).

The spelling of 15944 in words is "fifteen thousand, nine hundred forty-four".