985259639 has 32 divisors (see below), whose sum is σ = 1267875840. Its totient is φ = 744681600.

The previous prime is 985259629. The next prime is 985259641. The reversal of 985259639 is 936952589.

It is not a de Polignac number, because 985259639 - 2²⁸ = 716824183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (985259609) 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, 220649 + ... + 225069.

It is an arithmetic number, because the mean of its divisors is an integer number (39621120).

Almost surely, 2^985259639 is an apocalyptic number.

985259639 is a deficient number, since it is larger than the sum of its proper divisors (282616201).

985259639 is a wasteful number, since it uses less digits than its factorization.

985259639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4551.

The product of its digits is 5248800, while the sum is 56.

The square root of 985259639 is about 31388.8457736184. The cubic root of 985259639 is about 995.0622046411.

The spelling of 985259639 in words is "nine hundred eighty-five million, two hundred fifty-nine thousand, six hundred thirty-nine".