8422220 has 24 divisors (see below), whose sum is σ = 18119808. Its totient is φ = 3286400.

The previous prime is 8422217. The next prime is 8422223. The reversal of 8422220 is 222248.

It is an interprime number because it is at equal distance from previous prime (8422217) and next prime (8422223).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 8422192 and 8422201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8422223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4316 + ... + 5955.

It is an arithmetic number, because the mean of its divisors is an integer number (754992).

Almost surely, 2^8422220 is an apocalyptic number.

It is an amenable number.

8422220 is an abundant number, since it is smaller than the sum of its proper divisors (9697588).

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

8422220 is a wasteful number, since it uses less digits than its factorization.

8422220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10321 (or 10319 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 8422220 is about 2902.1061317602. The cubic root of 8422220 is about 203.4583542409.

Adding to 8422220 its reverse (222248), we get a palindrome (8644468).

The spelling of 8422220 in words is "eight million, four hundred twenty-two thousand, two hundred twenty".