839528639 has 18 divisors (see below), whose sum is σ = 887003208. Its totient is φ = 794554800.

The previous prime is 839528611. The next prime is 839528659. The reversal of 839528639 is 936825938.

It is not a de Polignac number, because 839528639 - 2¹⁶ = 839463103 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (839528609) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2699294 + ... + 2699604.

It is an arithmetic number, because the mean of its divisors is an integer number (49277956).

Almost surely, 2^839528639 is an apocalyptic number.

839528639 is a deficient number, since it is larger than the sum of its proper divisors (47474569).

839528639 is an equidigital number, since it uses as much as digits as its factorization.

839528639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479 (or 395 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 53.

The square root of 839528639 is about 28974.6206014850. The cubic root of 839528639 is about 943.3622759818.

The spelling of 839528639 in words is "eight hundred thirty-nine million, five hundred twenty-eight thousand, six hundred thirty-nine".