439998 has 16 divisors (see below), whose sum is σ = 947856. Its totient is φ = 135360.

The previous prime is 439991. The next prime is 440009. The reversal of 439998 is 899934.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (439991) 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 7 ways as a sum of consecutive naturals, for example, 2743 + ... + 2898.

It is an arithmetic number, because the mean of its divisors is an integer number (59241).

2⁴³⁹⁹⁹⁸ is an apocalyptic number.

439998 is an abundant number, since it is smaller than the sum of its proper divisors (507858).

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

439998 is a wasteful number, since it uses less digits than its factorization.

439998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5659.

The product of its digits is 69984, while the sum is 42.

The square root of 439998 is about 663.3234505126. The cubic root of 439998 is about 76.0589339741.

The spelling of 439998 in words is "four hundred thirty-nine thousand, nine hundred ninety-eight".