439985 has 16 divisors (see below), whose sum is σ = 650496. Its totient is φ = 278208.

The previous prime is 439981. The next prime is 439991. The reversal of 439985 is 589934.

It is not a de Polignac number, because 439985 - 2² = 439981 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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 (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29 + ... + 938.

It is an arithmetic number, because the mean of its divisors is an integer number (40656).

2⁴³⁹⁹⁸⁵ is an apocalyptic number.

It is an amenable number.

439985 is a deficient number, since it is larger than the sum of its proper divisors (210511).

439985 is a wasteful number, since it uses less digits than its factorization.

439985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 992.

The product of its digits is 38880, while the sum is 38.

The square root of 439985 is about 663.3136512993. The cubic root of 439985 is about 76.0581848980.

The spelling of 439985 in words is "four hundred thirty-nine thousand, nine hundred eighty-five".