22424444 has 12 divisors (see below), whose sum is σ = 44848944. Its totient is φ = 9610464.

The previous prime is 22424429. The next prime is 22424489. The reversal of 22424444 is 44442422.

22424444 is an admirable number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 400409 + ... + 400464.

It is an arithmetic number, because the mean of its divisors is an integer number (3737412).

Almost surely, 2^22424444 is an apocalyptic number.

It is an amenable number.

22424444 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

22424444 is a wasteful number, since it uses less digits than its factorization.

22424444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800884 (or 800882 counting only the distinct ones).

The product of its digits is 8192, while the sum is 26.

The square root of 22424444 is about 4735.4454911867. The cubic root of 22424444 is about 281.9944502035.

Adding to 22424444 its reverse (44442422), we get a palindrome (66866866).

The spelling of 22424444 in words is "twenty-two million, four hundred twenty-four thousand, four hundred forty-four".