839528649 has 12 divisors (see below), whose sum is σ = 1227263856. Its totient is φ = 552942072.

The previous prime is 839528611. The next prime is 839528659. The reversal of 839528649 is 946825938.

It is not a de Polignac number, because 839528649 - 2²³ = 831140041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 839528595 and 839528604.

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

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 561187 + ... + 562680.

It is an arithmetic number, because the mean of its divisors is an integer number (102271988).

Almost surely, 2^839528649 is an apocalyptic number.

It is an amenable number.

839528649 is a deficient number, since it is larger than the sum of its proper divisors (387735207).

839528649 is a wasteful number, since it uses less digits than its factorization.

839528649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1123956 (or 1123953 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 54.

The square root of 839528649 is about 28974.6207740498. The cubic root of 839528649 is about 943.3622797274.

The spelling of 839528649 in words is "eight hundred thirty-nine million, five hundred twenty-eight thousand, six hundred forty-nine".