222444288 has 216 divisors, whose sum is σ = 715530816. Its totient is φ = 65894400.

The previous prime is 222444281. The next prime is 222444317. The reversal of 222444288 is 882444222.

It is a happy number.

222444288 is a `hidden beast` number, since 2 + 224 + 4 + 428 + 8 = 666.

It is a super-2 number, since 2×222444288² = 98962922527653888, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (222444281) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1697983 + ... + 1698113.

Almost surely, 2^222444288 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222444288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (357765408).

222444288 is an abundant number, since it is smaller than the sum of its proper divisors (493086528).

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

222444288 is a wasteful number, since it uses less digits than its factorization.

222444288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231 (or 214 counting only the distinct ones).

The product of its digits is 65536, while the sum is 36.

The square root of 222444288 is about 14914.5663027793. The cubic root of 222444288 is about 605.9085572575.

The spelling of 222444288 in words is "two hundred twenty-two million, four hundred forty-four thousand, two hundred eighty-eight".