22129444 has 24 divisors (see below), whose sum is σ = 41155128. Its totient is φ = 10375680.

The previous prime is 22129423. The next prime is 22129501. The reversal of 22129444 is 44492122.

It can be written as a sum of positive squares in 4 ways, for example, as 152100 + 21977344 = 390^2 + 4688^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28242 + ... + 29014.

It is an arithmetic number, because the mean of its divisors is an integer number (1714797).

Almost surely, 2^22129444 is an apocalyptic number.

It is an amenable number.

22129444 is a deficient number, since it is larger than the sum of its proper divisors (19025684).

22129444 is a wasteful number, since it uses less digits than its factorization.

22129444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1215 (or 1213 counting only the distinct ones).

The product of its digits is 4608, while the sum is 28.

The square root of 22129444 is about 4704.1942987083. The cubic root of 22129444 is about 280.7524150771.

The spelling of 22129444 in words is "twenty-two million, one hundred twenty-nine thousand, four hundred forty-four".