855811008 has 392 divisors, whose sum is σ = 2938351248. Its totient is φ = 244850688.

The previous prime is 855811007. The next prime is 855811031. The reversal of 855811008 is 800118558.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855811007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 10310935 + ... + 10311017.

It is an arithmetic number, because the mean of its divisors is an integer number (7495794).

Almost surely, 2^855811008 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 855811008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1469175624).

855811008 is an abundant number, since it is smaller than the sum of its proper divisors (2082540240).

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

855811008 is a wasteful number, since it uses less digits than its factorization.

855811008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143 (or 118 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 36.

The square root of 855811008 is about 29254.2476915746. The cubic root of 855811008 is about 949.4219966917.

The spelling of 855811008 in words is "eight hundred fifty-five million, eight hundred eleven thousand, eight".