8222440 has 64 divisors (see below), whose sum is σ = 20160000. Its totient is φ = 3006720.

The previous prime is 8222437. The next prime is 8222447. The reversal of 8222440 is 442228.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8222447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23386 + ... + 23734.

It is an arithmetic number, because the mean of its divisors is an integer number (315000).

Almost surely, 2^8222440 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 8222440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10080000).

8222440 is an abundant number, since it is smaller than the sum of its proper divisors (11937560).

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

8222440 is a wasteful number, since it uses less digits than its factorization.

8222440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410 (or 406 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 8222440 is about 2867.4797296581. The cubic root of 8222440 is about 201.8367468343.

Adding to 8222440 its reverse (442228), we get a palindrome (8664668).

It can be divided in two parts, 82 and 22440, that added together give a palindrome (22522).

The spelling of 8222440 in words is "eight million, two hundred twenty-two thousand, four hundred forty".