439084809 has 24 divisors (see below), whose sum is σ = 657405320. Its totient is φ = 282175488.

The previous prime is 439084799. The next prime is 439084817. The reversal of 439084809 is 908480934.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 70560000 + 368524809 = 8400^2 + 19197^2 .

It is not a de Polignac number, because 439084809 - 2¹² = 439080713 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (439084859) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30249 + ... + 42345.

Almost surely, 2^439084809 is an apocalyptic number.

It is an amenable number.

439084809 is a deficient number, since it is larger than the sum of its proper divisors (218320511).

439084809 is a wasteful number, since it uses less digits than its factorization.

439084809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12249 (or 12246 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 439084809 is about 20954.3505983841. The cubic root of 439084809 is about 760.0627885567.

The spelling of 439084809 in words is "four hundred thirty-nine million, eighty-four thousand, eight hundred nine".