439863489 has 12 divisors (see below), whose sum is σ = 684232276. Its totient is φ = 270685152.

The previous prime is 439863481. The next prime is 439863493. The reversal of 439863489 is 984368934.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 31136400 + 408727089 = 5580^2 + 20217^2 .

It is not a de Polignac number, because 439863489 - 2³ = 439863481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (439863481) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1879642 + ... + 1879875.

Almost surely, 2^439863489 is an apocalyptic number.

It is an amenable number.

439863489 is a deficient number, since it is larger than the sum of its proper divisors (244368787).

439863489 is a wasteful number, since it uses less digits than its factorization.

439863489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3759536 (or 3759533 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 54.

The square root of 439863489 is about 20972.9227576893. The cubic root of 439863489 is about 760.5118257066.

Subtracting 439863489 from its reverse (984368934), we obtain a palindrome (544505445).

The spelling of 439863489 in words is "four hundred thirty-nine million, eight hundred sixty-three thousand, four hundred eighty-nine".