1322388720000 has 320 divisors, whose sum is σ = 4877051031600. Its totient is φ = 352636416000.

The previous prime is 1322388719941. The next prime is 1322388720041. The reversal of 1322388720000 is 278832231.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (320).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1853892 + ... + 2466108.

Almost surely, 2^{1322388720000} is an apocalyptic number.

1322388720000 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 1322388720000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2438525515800).

1322388720000 is an abundant number, since it is smaller than the sum of its proper divisors (3554662311600).

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

1322388720000 is an frugal number, since it uses more digits than its factorization.

1322388720000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612260 (or 612227 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The spelling of 1322388720000 in words is "one trillion, three hundred twenty-two billion, three hundred eighty-eight million, seven hundred twenty thousand".