22129228 has 12 divisors (see below), whose sum is σ = 42246792. Its totient is φ = 10058720.

The previous prime is 22129213. The next prime is 22129273. The reversal of 22129228 is 82292122.

It is a junction number, because it is equal to n+sod(n) for n = 22129196 and 22129205.

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 3 ways as a sum of consecutive naturals, for example, 251425 + ... + 251512.

It is an arithmetic number, because the mean of its divisors is an integer number (3520566).

Almost surely, 2^22129228 is an apocalyptic number.

It is an amenable number.

22129228 is a deficient number, since it is larger than the sum of its proper divisors (20117564).

22129228 is a wasteful number, since it uses less digits than its factorization.

22129228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502952 (or 502950 counting only the distinct ones).

The product of its digits is 2304, while the sum is 28.

The square root of 22129228 is about 4704.1713404169. The cubic root of 22129228 is about 280.7515016227.

The spelling of 22129228 in words is "twenty-two million, one hundred twenty-nine thousand, two hundred twenty-eight".