1222388900 has 36 divisors (see below), whose sum is σ = 2738158080. Its totient is φ = 473181600.

The previous prime is 1222388899. The next prime is 1222388911. The reversal of 1222388900 is 98832221.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 194060 + ... + 200259.

Almost surely, 2^1222388900 is an apocalyptic number.

1222388900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222388900 is an abundant number, since it is smaller than the sum of its proper divisors (1515769180).

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

1222388900 is a wasteful number, since it uses less digits than its factorization.

1222388900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394364 (or 394357 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 1222388900 is about 34962.6786731223. The cubic root of 1222388900 is about 1069.2267100344.

The spelling of 1222388900 in words is "one billion, two hundred twenty-two million, three hundred eighty-eight thousand, nine hundred".