439889 has 4 divisors (see below), whose sum is σ = 450660. Its totient is φ = 429120.

The previous prime is 439883. The next prime is 439891. The reversal of 439889 is 988934.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 153664 + 286225 = 392^2 + 535^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-439889 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41), and also a Moran number because the ratio is a prime number: 10729 = 439889 / (4 + 3 + 9 + 8 + 8 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (439883) 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, 5324 + ... + 5405.

It is an arithmetic number, because the mean of its divisors is an integer number (112665).

2⁴³⁹⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

439889 is a deficient number, since it is larger than the sum of its proper divisors (10771).

439889 is a wasteful number, since it uses less digits than its factorization.

439889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10770.

The product of its digits is 62208, while the sum is 41.

The square root of 439889 is about 663.2412833954. The cubic root of 439889 is about 76.0526528027.

It can be divided in two parts, 4 and 39889, that added together give a palindrome (39893).

The spelling of 439889 in words is "four hundred thirty-nine thousand, eight hundred eighty-nine".