439904 has 24 divisors (see below), whose sum is σ = 884520. Its totient is φ = 215296.

The previous prime is 439903. The next prime is 439919. The reversal of 439904 is 409934.

It is a happy number.

439904 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (439903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1772 + ... + 2004.

It is an arithmetic number, because the mean of its divisors is an integer number (36855).

2⁴³⁹⁹⁰⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 439904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (442260).

439904 is an abundant number, since it is smaller than the sum of its proper divisors (444616).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

439904 is a wasteful number, since it uses less digits than its factorization.

439904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302 (or 294 counting only the distinct ones).

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

The square root of 439904 is about 663.2525914009. The cubic root of 439904 is about 76.0535172457.

The spelling of 439904 in words is "four hundred thirty-nine thousand, nine hundred four".