855806208 has 144 divisors (see below), whose sum is σ = 2417479680. Its totient is φ = 268019712.

The previous prime is 855806177. The next prime is 855806267. The reversal of 855806208 is 802608558.

It is a self number, because there is not a number n which added to its sum of digits gives 855806208.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3253885 + ... + 3254147.

Almost surely, 2^855806208 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 855806208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1208739840).

855806208 is an abundant number, since it is smaller than the sum of its proper divisors (1561673472).

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

855806208 is a wasteful number, since it uses less digits than its factorization.

855806208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524 (or 510 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 42.

The square root of 855806208 is about 29254.1656520913. The cubic root of 855806208 is about 949.4202216759.

The spelling of 855806208 in words is "eight hundred fifty-five million, eight hundred six thousand, two hundred eight".