1322020320 has 96 divisors (see below), whose sum is σ = 4172085792. Its totient is φ = 351885312.

The previous prime is 1322020261. The next prime is 1322020321. The reversal of 1322020320 is 230202231.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1322020320.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1322020321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 291994 + ... + 296486.

It is an arithmetic number, because the mean of its divisors is an integer number (43459227).

Almost surely, 2^1322020320 is an apocalyptic number.

1322020320 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 1322020320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2086042896).

1322020320 is an abundant number, since it is smaller than the sum of its proper divisors (2850065472).

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

1322020320 is a wasteful number, since it uses less digits than its factorization.

1322020320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5124 (or 5116 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 1322020320 is about 36359.5973575066. The cubic root of 1322020320 is about 1097.5206749218.

Adding to 1322020320 its reverse (230202231), we get a palindrome (1552222551).

The spelling of 1322020320 in words is "one billion, three hundred twenty-two million, twenty thousand, three hundred twenty".