439885 has 4 divisors (see below), whose sum is σ = 527868. Its totient is φ = 351904.

The previous prime is 439883. The next prime is 439891. The reversal of 439885 is 588934.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 588934 = 2 ⋅294467.

It can be written as a sum of positive squares in 2 ways, for example, as 328329 + 111556 = 573^2 + 334^2 .

It is a cyclic number.

It is not a de Polignac number, because 439885 - 2¹ = 439883 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (439883) 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 3 ways as a sum of consecutive naturals, for example, 43984 + ... + 43993.

It is an arithmetic number, because the mean of its divisors is an integer number (131967).

2⁴³⁹⁸⁸⁵ is an apocalyptic number.

It is an amenable number.

439885 is a deficient number, since it is larger than the sum of its proper divisors (87983).

439885 is an equidigital number, since it uses as much as digits as its factorization.

439885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87982.

The product of its digits is 34560, while the sum is 37.

The square root of 439885 is about 663.2382678947. The cubic root of 439885 is about 76.0524222813.

The spelling of 439885 in words is "four hundred thirty-nine thousand, eight hundred eighty-five".