855889860 has 144 divisors (see below), whose sum is σ = 2819940480. Its totient is φ = 193374720.

The previous prime is 855889849. The next prime is 855889861. The reversal of 855889860 is 68988558.

855889860 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 855889860.

It is not an unprimeable number, because it can be changed into a prime (855889861) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 260025 + ... + 263295.

It is an arithmetic number, because the mean of its divisors is an integer number (19582920).

Almost surely, 2^855889860 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 855889860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1409970240).

855889860 is an abundant number, since it is smaller than the sum of its proper divisors (1964050620).

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

855889860 is a wasteful number, since it uses less digits than its factorization.

855889860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3386 (or 3377 counting only the distinct ones).

The product of its (nonzero) digits is 5529600, while the sum is 57.

The square root of 855889860 is about 29255.5953622551. The cubic root of 855889860 is about 949.4511548132.

The spelling of 855889860 in words is "eight hundred fifty-five million, eight hundred eighty-nine thousand, eight hundred sixty".