1322622720 has 432 divisors, whose sum is σ = 4907316960. Its totient is φ = 328237056.

The previous prime is 1322622671. The next prime is 1322622727. The reversal of 1322622720 is 272262231.

1322622720 is a `hidden beast` number, since 1 + 32 + 2 + 622 + 7 + 2 + 0 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1322622727) 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, 12360907 + ... + 12361013.

It is an arithmetic number, because the mean of its divisors is an integer number (11359530).

Almost surely, 2^1322622720 is an apocalyptic number.

1322622720 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 1322622720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2453658480).

1322622720 is an abundant number, since it is smaller than the sum of its proper divisors (3584694240).

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

1322622720 is a wasteful number, since it uses less digits than its factorization.

1322622720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200 (or 183 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 1322622720 is about 36367.8803341630. The cubic root of 1322622720 is about 1097.6873506401.

Adding to 1322622720 its reverse (272262231), we get a palindrome (1594884951).

The spelling of 1322622720 in words is "one billion, three hundred twenty-two million, six hundred twenty-two thousand, seven hundred twenty".