855784216 has 96 divisors (see below), whose sum is σ = 2014489440. Its totient is φ = 338537472.

The previous prime is 855784201. The next prime is 855784243. The reversal of 855784216 is 612487558.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 351981 + ... + 354403.

It is an arithmetic number, because the mean of its divisors is an integer number (20984265).

Almost surely, 2^855784216 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 855784216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1007244720).

855784216 is an abundant number, since it is smaller than the sum of its proper divisors (1158705224).

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

855784216 is a wasteful number, since it uses less digits than its factorization.

855784216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2513 (or 2502 counting only the distinct ones).

The product of its digits is 537600, while the sum is 46.

The square root of 855784216 is about 29253.7897715834. The cubic root of 855784216 is about 949.4120890605.

The spelling of 855784216 in words is "eight hundred fifty-five million, seven hundred eighty-four thousand, two hundred sixteen".