8442220 has 12 divisors (see below), whose sum is σ = 17728704. Its totient is φ = 3376880.

The previous prime is 8442167. The next prime is 8442221. The reversal of 8442220 is 222448.

8442220 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 8442191 and 8442200.

It is not an unprimeable number, because it can be changed into a prime (8442221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211036 + ... + 211075.

It is an arithmetic number, because the mean of its divisors is an integer number (1477392).

Almost surely, 2^8442220 is an apocalyptic number.

It is an amenable number.

8442220 is an abundant number, since it is smaller than the sum of its proper divisors (9286484).

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

8442220 is a wasteful number, since it uses less digits than its factorization.

8442220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422120 (or 422118 counting only the distinct ones).

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

The square root of 8442220 is about 2905.5498619022. The cubic root of 8442220 is about 203.6192758012.

Adding to 8442220 its reverse (222448), we get a palindrome (8664668).

The spelling of 8442220 in words is "eight million, four hundred forty-two thousand, two hundred twenty".