861744222 has 48 divisors (see below), whose sum is σ = 1939148640. Its totient is φ = 276244416.

The previous prime is 861744203. The next prime is 861744223. The reversal of 861744222 is 222447168.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861744223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 134148 + ... + 140424.

It is an arithmetic number, because the mean of its divisors is an integer number (40398930).

Almost surely, 2^861744222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 861744222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (969574320).

861744222 is an abundant number, since it is smaller than the sum of its proper divisors (1077404418).

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

861744222 is a wasteful number, since it uses less digits than its factorization.

861744222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6577 (or 6574 counting only the distinct ones).

The product of its digits is 43008, while the sum is 36.

The square root of 861744222 is about 29355.4802720037. The cubic root of 861744222 is about 951.6110142284.

The spelling of 861744222 in words is "eight hundred sixty-one million, seven hundred forty-four thousand, two hundred twenty-two".