8722228 has 6 divisors (see below), whose sum is σ = 15263906. Its totient is φ = 4361112.

The previous prime is 8722223. The next prime is 8722237. The reversal of 8722228 is 8222278.

It is a happy number.

8722228 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 7551504 + 1170724 = 2748^2 + 1082^2 .

It is a super-2 number, since 2×8722228² = 152154522567968, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 8722228.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8722223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1090275 + ... + 1090282.

Almost surely, 2^8722228 is an apocalyptic number.

It is an amenable number.

8722228 is a deficient number, since it is larger than the sum of its proper divisors (6541678).

8722228 is a wasteful number, since it uses less digits than its factorization.

8722228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2180561 (or 2180559 counting only the distinct ones).

The product of its digits is 7168, while the sum is 31.

The square root of 8722228 is about 2953.3418359547. The cubic root of 8722228 is about 205.8460218629.

The spelling of 8722228 in words is "eight million, seven hundred twenty-two thousand, two hundred twenty-eight".