439040 has 72 divisors (see below), whose sum is σ = 1226400. Its totient is φ = 150528.

The previous prime is 439009. The next prime is 439063. The reversal of 439040 is 40934.

It is a super-2 number, since 2×439040² = 385512243200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a nialpdrome in base 14.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62717 + ... + 62723.

2⁴³⁹⁰⁴⁰ is an apocalyptic number.

439040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 439040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (613200).

439040 is an abundant number, since it is smaller than the sum of its proper divisors (787360).

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

439040 is an frugal number, since it uses more digits than its factorization.

439040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42 (or 14 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 439040 is about 662.6009357072. The cubic root of 439040 is about 76.0036932647.

439040 divided by its sum of digits (20) gives a cube (21952 = 28³).

Adding to 439040 its reverse (40934), we get a palindrome (479974).

The spelling of 439040 in words is "four hundred thirty-nine thousand, forty".