856056644 has 6 divisors (see below), whose sum is σ = 1498099134. Its totient is φ = 428028320.

The previous prime is 856056631. The next prime is 856056683. The reversal of 856056644 is 446650658.

It can be written as a sum of positive squares in only one way, i.e., 790284544 + 65772100 = 28112^2 + 8110^2 .

It is a junction number, because it is equal to n+sod(n) for n = 856056595 and 856056604.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107007077 + ... + 107007084.

It is an arithmetic number, because the mean of its divisors is an integer number (249683189).

Almost surely, 2^856056644 is an apocalyptic number.

It is an amenable number.

856056644 is a deficient number, since it is larger than the sum of its proper divisors (642042490).

856056644 is a wasteful number, since it uses less digits than its factorization.

856056644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214014165 (or 214014163 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 44.

The square root of 856056644 is about 29258.4456866731. The cubic root of 856056644 is about 949.5128227856.

The spelling of 856056644 in words is "eight hundred fifty-six million, fifty-six thousand, six hundred forty-four".