1222839189 has 72 divisors (see below), whose sum is σ = 2214268056. Its totient is φ = 643737600.

The previous prime is 1222839173. The next prime is 1222839193. The reversal of 1222839189 is 9819382221.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 24502500 + 1198336689 = 4950^2 + 34617^2 .

It is not a de Polignac number, because 1222839189 - 2⁴ = 1222839173 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222839139) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 238129 + ... + 243209.

It is an arithmetic number, because the mean of its divisors is an integer number (30753723).

Almost surely, 2^1222839189 is an apocalyptic number.

It is an amenable number.

1222839189 is a deficient number, since it is larger than the sum of its proper divisors (991428867).

1222839189 is a wasteful number, since it uses less digits than its factorization.

1222839189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5139 (or 5125 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 1222839189 is about 34969.1176468609. The cubic root of 1222839189 is about 1069.3579835649.

The spelling of 1222839189 in words is "one billion, two hundred twenty-two million, eight hundred thirty-nine thousand, one hundred eighty-nine".