439440 has 40 divisors (see below), whose sum is σ = 1363008. Its totient is φ = 117120.

The previous prime is 439429. The next prime is 439441. The reversal of 439440 is 44934.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a d-powerful number, because it can be written as 4 + 3¹¹ + 4³ + 9² + 4⁹ + 0 .

It is a self number, because there is not a number n which added to its sum of digits gives 439440.

It is not an unprimeable number, because it can be changed into a prime (439441) by changing a digit.

439440 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 676 + ... + 1155.

2⁴³⁹⁴⁴⁰ is an apocalyptic number.

439440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

439440 is an abundant number, since it is smaller than the sum of its proper divisors (923568).

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

439440 is a wasteful number, since it uses less digits than its factorization.

439440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1847 (or 1841 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 439440 is about 662.9027077935. The cubic root of 439440 is about 76.0267680409.

The spelling of 439440 in words is "four hundred thirty-nine thousand, four hundred forty".