439630809 has 32 divisors (see below), whose sum is σ = 644972544. Its totient is φ = 265467840.

The previous prime is 439630783. The next prime is 439630811. The reversal of 439630809 is 908036934.

It is not a de Polignac number, because 439630809 - 2⁵ = 439630777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (439630819) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 98347 + ... + 102719.

It is an arithmetic number, because the mean of its divisors is an integer number (20155392).

Almost surely, 2^439630809 is an apocalyptic number.

It is an amenable number.

439630809 is a deficient number, since it is larger than the sum of its proper divisors (205341735).

439630809 is a wasteful number, since it uses less digits than its factorization.

439630809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4477.

The product of its (nonzero) digits is 139968, while the sum is 42.

The square root of 439630809 is about 20967.3748714521. The cubic root of 439630809 is about 760.3777029561.

The spelling of 439630809 in words is "four hundred thirty-nine million, six hundred thirty thousand, eight hundred nine".