856536844 has 12 divisors (see below), whose sum is σ = 1521312184. Its totient is φ = 421876224.

The previous prime is 856536841. The next prime is 856536871. The reversal of 856536844 is 448635658.

It is a happy number.

856536844 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (856536841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1597749 + ... + 1598284.

Almost surely, 2^856536844 is an apocalyptic number.

It is an amenable number.

856536844 is a deficient number, since it is larger than the sum of its proper divisors (664775340).

856536844 is a wasteful number, since it uses less digits than its factorization.

856536844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3196104 (or 3196102 counting only the distinct ones).

The product of its digits is 2764800, while the sum is 49.

The square root of 856536844 is about 29266.6507137390. The cubic root of 856536844 is about 949.6903308325.

The spelling of 856536844 in words is "eight hundred fifty-six million, five hundred thirty-six thousand, eight hundred forty-four".