985839 has 8 divisors (see below), whose sum is σ = 1319472. Its totient is φ = 654720.

The previous prime is 985819. The next prime is 985867. The reversal of 985839 is 938589.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 985839 - 2⁵ = 985807 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 985839.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 985839.

It is not an unprimeable number, because it can be changed into a prime (985819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 679 + ... + 1559.

It is an arithmetic number, because the mean of its divisors is an integer number (164934).

2⁹⁸⁵⁸³⁹ is an apocalyptic number.

985839 is a deficient number, since it is larger than the sum of its proper divisors (333633).

985839 is a wasteful number, since it uses less digits than its factorization.

985839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1257.

The product of its digits is 77760, while the sum is 42.

The square root of 985839 is about 992.8942541882. The cubic root of 985839 is about 99.5257208154.

The spelling of 985839 in words is "nine hundred eighty-five thousand, eight hundred thirty-nine".