856800612 has 144 divisors (see below), whose sum is σ = 2392438720. Its totient is φ = 265089024.

The previous prime is 856800569. The next prime is 856800631. The reversal of 856800612 is 216008658.

It is a happy number.

856800612 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3027423 + ... + 3027705.

Almost surely, 2^856800612 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 856800612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1196219360).

856800612 is an abundant number, since it is smaller than the sum of its proper divisors (1535638108).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

856800612 is a wasteful number, since it uses less digits than its factorization.

856800612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427 (or 402 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 856800612 is about 29271.1566563400. The cubic root of 856800612 is about 949.7878056082.

The spelling of 856800612 in words is "eight hundred fifty-six million, eight hundred thousand, six hundred twelve".