839855656 has 16 divisors (see below), whose sum is σ = 1596302100. Its totient is φ = 414175104.

The previous prime is 839855633. The next prime is 839855657. The reversal of 839855656 is 656558938.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 825642756 + 14212900 = 28734^2 + 3770^2 .

It is a junction number, because it is equal to n+sod(n) for n = 839855597 and 839855606.

It is not an unprimeable number, because it can be changed into a prime (839855657) 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 3 ways as a sum of consecutive naturals, for example, 718471 + ... + 719638.

Almost surely, 2^839855656 is an apocalyptic number.

It is an amenable number.

839855656 is a deficient number, since it is larger than the sum of its proper divisors (756446444).

839855656 is a wasteful number, since it uses less digits than its factorization.

839855656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1438188 (or 1438184 counting only the distinct ones).

The product of its digits is 7776000, while the sum is 55.

The square root of 839855656 is about 28980.2632148157. The cubic root of 839855656 is about 943.4847476642.

The spelling of 839855656 in words is "eight hundred thirty-nine million, eight hundred fifty-five thousand, six hundred fifty-six".