1222387890 has 32 divisors (see below), whose sum is σ = 3106304640. Its totient is φ = 306795264.

The previous prime is 1222387879. The next prime is 1222387913. The reversal of 1222387890 is 987832221.

It is a happy number.

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 15 ways as a sum of consecutive naturals, for example, 1197910 + ... + 1198929.

It is an arithmetic number, because the mean of its divisors is an integer number (97072020).

Almost surely, 2^1222387890 is an apocalyptic number.

1222387890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1222387890 is an abundant number, since it is smaller than the sum of its proper divisors (1883916750).

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

1222387890 is a wasteful number, since it uses less digits than its factorization.

1222387890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2396866.

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 1222387890 is about 34962.6642291459. The cubic root of 1222387890 is about 1069.2264155511.

The spelling of 1222387890 in words is "one billion, two hundred twenty-two million, three hundred eighty-seven thousand, eight hundred ninety".