1222642368 has 84 divisors (see below), whose sum is σ = 3563980680. Its totient is φ = 400628736.

The previous prime is 1222642361. The next prime is 1222642409. The reversal of 1222642368 is 8632462221.

1222642368 is a `hidden beast` number, since 1 + 2 + 2 + 2 + 642 + 3 + 6 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1222642361) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15996 + ... + 51972.

Almost surely, 2^1222642368 is an apocalyptic number.

1222642368 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1222642368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1781990340).

1222642368 is an abundant number, since it is smaller than the sum of its proper divisors (2341338312).

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

1222642368 is a wasteful number, since it uses less digits than its factorization.

1222642368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36054 (or 36041 counting only the distinct ones).

The product of its digits is 55296, while the sum is 36.

The square root of 1222642368 is about 34966.3033219127. The cubic root of 1222642368 is about 1069.3006079638.

The spelling of 1222642368 in words is "one billion, two hundred twenty-two million, six hundred forty-two thousand, three hundred sixty-eight".