1219222368 has 288 divisors, whose sum is σ = 4427894016. Its totient is φ = 321366528.

The previous prime is 1219222363. The next prime is 1219222369. The reversal of 1219222368 is 8632229121.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (288).

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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1219222363) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 706755 + ... + 708477.

It is an arithmetic number, because the mean of its divisors is an integer number (15374632).

Almost surely, 2^1219222368 is an apocalyptic number.

1219222368 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 1219222368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2213947008).

1219222368 is an abundant number, since it is smaller than the sum of its proper divisors (3208671648).

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

1219222368 is a wasteful number, since it uses less digits than its factorization.

1219222368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1768 (or 1748 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 1219222368 is about 34917.3648490261. The cubic root of 1219222368 is about 1068.3026537778.

The spelling of 1219222368 in words is "one billion, two hundred nineteen million, two hundred twenty-two thousand, three hundred sixty-eight".