39944 has 8 divisors (see below), whose sum is σ = 74910. Its totient is φ = 19968.

The previous prime is 39937. The next prime is 39953. The reversal of 39944 is 44993.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 36100 + 3844 = 190^2 + 62^2 .

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

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 2489 + ... + 2504.

2³⁹⁹⁴⁴ is an apocalyptic number.

It is an amenable number.

39944 is a deficient number, since it is larger than the sum of its proper divisors (34966).

39944 is a wasteful number, since it uses less digits than its factorization.

39944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4999 (or 4995 counting only the distinct ones).

The product of its digits is 3888, while the sum is 29.

The square root of 39944 is about 199.8599509657. The cubic root of 39944 is about 34.1835517043.

The spelling of 39944 in words is "thirty-nine thousand, nine hundred forty-four".