222009228 has 96 divisors (see below), whose sum is σ = 679096320. Its totient is φ = 61378560.

The previous prime is 222009223. The next prime is 222009241. The reversal of 222009228 is 822900222.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (222009223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18700 + ... + 28172.

It is an arithmetic number, because the mean of its divisors is an integer number (7073920).

Almost surely, 2^222009228 is an apocalyptic number.

222009228 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222009228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (339548160).

222009228 is an abundant number, since it is smaller than the sum of its proper divisors (457087092).

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

222009228 is a wasteful number, since it uses less digits than its factorization.

222009228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9524 (or 9516 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 222009228 is about 14899.9740939372. The cubic root of 222009228 is about 605.5132843234.

The spelling of 222009228 in words is "two hundred twenty-two million, nine thousand, two hundred twenty-eight".