1322120340 has 192 divisors, whose sum is σ = 4247147520. Its totient is φ = 341268480.

The previous prime is 1322120329. The next prime is 1322120341. The reversal of 1322120340 is 430212231.

1322120340 is a `hidden beast` number, since 1 + 322 + 1 + 2 + 0 + 340 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1322120341) 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 63 ways as a sum of consecutive naturals, for example, 2867710 + ... + 2868170.

It is an arithmetic number, because the mean of its divisors is an integer number (22120560).

Almost surely, 2^1322120340 is an apocalyptic number.

1322120340 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 1322120340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2123573760).

1322120340 is an abundant number, since it is smaller than the sum of its proper divisors (2925027180).

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

1322120340 is a wasteful number, since it uses less digits than its factorization.

1322120340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639 (or 631 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1322120340 is about 36360.9727592648. The cubic root of 1322120340 is about 1097.5483525724.

Adding to 1322120340 its reverse (430212231), we get a palindrome (1752332571).

The spelling of 1322120340 in words is "one billion, three hundred twenty-two million, one hundred twenty thousand, three hundred forty".