222222444 has 24 divisors (see below), whose sum is σ = 532534128. Its totient is φ = 72072000.

The previous prime is 222222437. The next prime is 222222449. The reversal of 222222444 is 444222222.

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

It is a plaindrome in base 10.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (222222449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 249807 + ... + 250694.

It is an arithmetic number, because the mean of its divisors is an integer number (22188922).

Almost surely, 2^222222444 is an apocalyptic number.

It is an amenable number.

222222444 is an abundant number, since it is smaller than the sum of its proper divisors (310311684).

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

222222444 is a wasteful number, since it uses less digits than its factorization.

222222444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500545 (or 500543 counting only the distinct ones).

The product of its digits is 4096, while the sum is 24.

The square root of 222222444 is about 14907.1272886495. The cubic root of 222222444 is about 605.7070657758.

Adding to 222222444 its reverse (444222222), we get a palindrome (666444666).

The spelling of 222222444 in words is "two hundred twenty-two million, two hundred twenty-two thousand, four hundred forty-four".