439872439 has 4 divisors (see below), whose sum is σ = 463023640. Its totient is φ = 416721240.

The previous prime is 439872431. The next prime is 439872449. The reversal of 439872439 is 934278934.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 439872439 - 2³ = 439872431 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 439872392 and 439872401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (439872431) 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, 11575572 + ... + 11575609.

It is an arithmetic number, because the mean of its divisors is an integer number (115755910).

Almost surely, 2^439872439 is an apocalyptic number.

439872439 is a deficient number, since it is larger than the sum of its proper divisors (23151201).

439872439 is a wasteful number, since it uses less digits than its factorization.

439872439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23151200.

The product of its digits is 1306368, while the sum is 49.

The square root of 439872439 is about 20973.1361269601. The cubic root of 439872439 is about 760.5169837726.

The spelling of 439872439 in words is "four hundred thirty-nine million, eight hundred seventy-two thousand, four hundred thirty-nine".