8220228 has 12 divisors (see below), whose sum is σ = 19180560. Its totient is φ = 2740072.

The previous prime is 8220221. The next prime is 8220229.

8220228 is nontrivially palindromic in base 10.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 8220198 and 8220207.

It is not an unprimeable number, because it can be changed into a prime (8220221) 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, 342498 + ... + 342521.

It is an arithmetic number, because the mean of its divisors is an integer number (1598380).

Almost surely, 2^8220228 is an apocalyptic number.

It is an amenable number.

8220228 is an abundant number, since it is smaller than the sum of its proper divisors (10960332).

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

8220228 is a wasteful number, since it uses less digits than its factorization.

8220228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685026 (or 685024 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 24.

The square root of 8220228 is about 2867.0939991566. The cubic root of 8220228 is about 201.8186458438.

It can be divided in two parts, 8220 and 228, that added together give a palindrome (8448).

The spelling of 8220228 in words is "eight million, two hundred twenty thousand, two hundred twenty-eight".