439136985 has 16 divisors (see below), whose sum is σ = 802993536. Its totient is φ = 200748288.

The previous prime is 439136983. The next prime is 439136989. The reversal of 439136985 is 589631934.

It is not a de Polignac number, because 439136985 - 2¹ = 439136983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (439136983) 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, 2091024 + ... + 2091233.

It is an arithmetic number, because the mean of its divisors is an integer number (50187096).

Almost surely, 2^439136985 is an apocalyptic number.

It is an amenable number.

439136985 is a deficient number, since it is larger than the sum of its proper divisors (363856551).

439136985 is a wasteful number, since it uses less digits than its factorization.

439136985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4182272.

The product of its digits is 699840, while the sum is 48.

The square root of 439136985 is about 20955.5955534554. The cubic root of 439136985 is about 760.0928931930.

The spelling of 439136985 in words is "four hundred thirty-nine million, one hundred thirty-six thousand, nine hundred eighty-five".