1322320320 has 168 divisors, whose sum is σ = 4634581536. Its totient is φ = 345925632.

The previous prime is 1322320291. The next prime is 1322320343. The reversal of 1322320320 is 230232231.

It is a happy number.

1322320320 is a `hidden beast` number, since 1 + 3 + 22 + 320 + 320 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1322320293 and 1322320302.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 148309 + ... + 156971.

Almost surely, 2^1322320320 is an apocalyptic number.

1322320320 is a gapful number since it is divisible by the number (10) 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 1322320320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2317290768).

1322320320 is an abundant number, since it is smaller than the sum of its proper divisors (3312261216).

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

1322320320 is a wasteful number, since it uses less digits than its factorization.

1322320320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8739 (or 8726 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 1322320320 is about 36363.7225817160. The cubic root of 1322320320 is about 1097.6036870851.

Adding to 1322320320 its reverse (230232231), we get a palindrome (1552552551).

The spelling of 1322320320 in words is "one billion, three hundred twenty-two million, three hundred twenty thousand, three hundred twenty".