8420222 has 8 divisors (see below), whose sum is σ = 12642696. Its totient is φ = 4205992.

The previous prime is 8420221. The next prime is 8420233. The reversal of 8420222 is 2220248.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 8420194 and 8420203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8420221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2633 + ... + 4875.

It is an arithmetic number, because the mean of its divisors is an integer number (1580337).

Almost surely, 2^8420222 is an apocalyptic number.

8420222 is a deficient number, since it is larger than the sum of its proper divisors (4222474).

8420222 is a wasteful number, since it uses less digits than its factorization.

8420222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4122.

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

The square root of 8420222 is about 2901.7618785834. The cubic root of 8420222 is about 203.4422641862.

The spelling of 8420222 in words is "eight million, four hundred twenty thousand, two hundred twenty-two".