5644 has 12 divisors (see below), whose sum is σ = 10584. Its totient is φ = 2624.

The previous prime is 5641. The next prime is 5647. The reversal of 5644 is 4465.

It is an interprime number because it is at equal distance from previous prime (5641) and next prime (5647).

It is a nialpdrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27 + ... + 109.

It is an arithmetic number, because the mean of its divisors is an integer number (882).

It is an amenable number.

5644 is a deficient number, since it is larger than the sum of its proper divisors (4940).

5644 is a wasteful number, since it uses less digits than its factorization.

5644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104 (or 102 counting only the distinct ones).

The product of its digits is 480, while the sum is 19.

The square root of 5644 is about 75.1265598840. The cubic root of 5644 is about 17.8044680111.

Subtracting from 5644 its sum of digits (19), we obtain a square (5625 = 75²).

It can be divided in two parts, 56 and 44, that added together give a square (100 = 10²).

The spelling of 5644 in words is "five thousand, six hundred forty-four".