850320618 has 48 divisors (see below), whose sum is σ = 1984951584. Its totient is φ = 242131680.

The previous prime is 850320589. The next prime is 850320619. The reversal of 850320618 is 816023058.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (850320619) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85548 + ... + 94968.

It is an arithmetic number, because the mean of its divisors is an integer number (41353158).

Almost surely, 2^850320618 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 850320618, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (992475792).

850320618 is an abundant number, since it is smaller than the sum of its proper divisors (1134630966).

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

850320618 is a wasteful number, since it uses less digits than its factorization.

850320618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9747 (or 9740 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 850320618 is about 29160.2575091510. The cubic root of 850320618 is about 947.3873246641.

The spelling of 850320618 in words is "eight hundred fifty million, three hundred twenty thousand, six hundred eighteen".