439965 has 16 divisors (see below), whose sum is σ = 782400. Its totient is φ = 234576.

The previous prime is 439961. The next prime is 439969. The reversal of 439965 is 569934.

It is an interprime number because it is at equal distance from previous prime (439961) and next prime (439969).

It is not a de Polignac number, because 439965 - 2² = 439961 is a prime.

439965 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (439961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1495 + ... + 1764.

It is an arithmetic number, because the mean of its divisors is an integer number (48900).

2⁴³⁹⁹⁶⁵ is an apocalyptic number.

439965 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

439965 is a deficient number, since it is larger than the sum of its proper divisors (342435).

439965 is a wasteful number, since it uses less digits than its factorization.

439965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3273 (or 3267 counting only the distinct ones).

The product of its digits is 29160, while the sum is 36.

The square root of 439965 is about 663.2985753038. The cubic root of 439965 is about 76.0570324445.

The spelling of 439965 in words is "four hundred thirty-nine thousand, nine hundred sixty-five".