439983 has 24 divisors (see below), whose sum is σ = 698880. Its totient is φ = 265680.

The previous prime is 439981. The next prime is 439991. The reversal of 439983 is 389934.

It is not a de Polignac number, because 439983 - 2¹ = 439981 is a prime.

439983 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (439981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5260 + ... + 5342.

It is an arithmetic number, because the mean of its divisors is an integer number (29120).

2⁴³⁹⁹⁸³ is an apocalyptic number.

439983 is a deficient number, since it is larger than the sum of its proper divisors (258897).

439983 is a wasteful number, since it uses less digits than its factorization.

439983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139 (or 136 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 439983 is about 663.3121437152. The cubic root of 439983 is about 76.0580696543.

The spelling of 439983 in words is "four hundred thirty-nine thousand, nine hundred eighty-three".