1222215968 has 48 divisors (see below), whose sum is σ = 2476152504. Its totient is φ = 593418240.

The previous prime is 1222215941. The next prime is 1222215971. The reversal of 1222215968 is 8695122221.

It can be written as a sum of positive squares in 4 ways, for example, as 1166085904 + 56130064 = 34148^2 + 7492^2 .

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 7 ways as a sum of consecutive naturals, for example, 1113596 + ... + 1114692.

Almost surely, 2^1222215968 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1222215968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1238076252).

1222215968 is an abundant number, since it is smaller than the sum of its proper divisors (1253936536).

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

1222215968 is a wasteful number, since it uses less digits than its factorization.

1222215968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2085 (or 2077 counting only the distinct ones).

The product of its digits is 34560, while the sum is 38.

The square root of 1222215968 is about 34960.2054913869. The cubic root of 1222215968 is about 1069.1762863016.

The spelling of 1222215968 in words is "one billion, two hundred twenty-two million, two hundred fifteen thousand, nine hundred sixty-eight".