22222444 has 6 divisors (see below), whose sum is σ = 38889284. Its totient is φ = 11111220.

The previous prime is 22222433. The next prime is 22222471. The reversal of 22222444 is 44422222.

It is a happy number.

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 an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2777802 + ... + 2777809.

Almost surely, 2^22222444 is an apocalyptic number.

It is an amenable number.

22222444 is a deficient number, since it is larger than the sum of its proper divisors (16666840).

22222444 is a wasteful number, since it uses less digits than its factorization.

22222444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5555615 (or 5555613 counting only the distinct ones).

The product of its digits is 2048, while the sum is 22.

The square root of 22222444 is about 4714.0687309372. The cubic root of 22222444 is about 281.1451570372.

Adding to 22222444 its reverse (44422222), we get a palindrome (66644666).

The spelling of 22222444 in words is "twenty-two million, two hundred twenty-two thousand, four hundred forty-four".