1323216396 has 72 divisors (see below), whose sum is σ = 3412521840. Its totient is φ = 432221184.

The previous prime is 1323216353. The next prime is 1323216397. The reversal of 1323216396 is 6936123231.

It is a happy number.

1323216396 is a `hidden beast` number, since 13 + 2 + 3 + 2 + 1 + 639 + 6 = 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 a self number, because there is not a number n which added to its sum of digits gives 1323216396.

It is not an unprimeable number, because it can be changed into a prime (1323216397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 426820 + ... + 429908.

Almost surely, 2^1323216396 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 1323216396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1706260920).

1323216396 is an abundant number, since it is smaller than the sum of its proper divisors (2089305444).

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

1323216396 is a wasteful number, since it uses less digits than its factorization.

1323216396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3335 (or 3330 counting only the distinct ones).

The product of its digits is 34992, while the sum is 36.

The square root of 1323216396 is about 36376.0415108626. The cubic root of 1323216396 is about 1097.8515630408.

The spelling of 1323216396 in words is "one billion, three hundred twenty-three million, two hundred sixteen thousand, three hundred ninety-six".