8427222 has 48 divisors (see below), whose sum is σ = 19721520. Its totient is φ = 2592000.

The previous prime is 8427217. The next prime is 8427233. The reversal of 8427222 is 2227248.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

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, 13722 + ... + 14322.

It is an arithmetic number, because the mean of its divisors is an integer number (410865).

Almost surely, 2^8427222 is an apocalyptic number.

8427222 is a gapful number since it is divisible by the number (82) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 8427222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9860760).

8427222 is an abundant number, since it is smaller than the sum of its proper divisors (11294298).

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

8427222 is a wasteful number, since it uses less digits than its factorization.

8427222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669 (or 666 counting only the distinct ones).

The product of its digits is 3584, while the sum is 27.

The square root of 8427222 is about 2902.9677917607. The cubic root of 8427222 is about 203.4986245925.

It can be divided in two parts, 842722 and 2, that added together give a square (842724 = 918²).

The spelling of 8427222 in words is "eight million, four hundred twenty-seven thousand, two hundred twenty-two".