1322000000 has 112 divisors (see below), whose sum is σ = 3297028110. Its totient is φ = 528000000.

The previous prime is 1321999979. The next prime is 1322000011. The reversal of 1322000000 is 2231.

It can be written as a sum of positive squares in 7 ways, for example, as 498539584 + 823460416 = 22328^2 + 28696^2 .

It is a Harshad number since it is a multiple of its sum of digits (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 1999670 + ... + 2000330.

Almost surely, 2^1322000000 is an apocalyptic number.

1322000000 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 1322000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1648514055).

1322000000 is an abundant number, since it is smaller than the sum of its proper divisors (1975028110).

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

1322000000 is an frugal number, since it uses more digits than its factorization.

1322000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 705 (or 668 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 8.

The square root of 1322000000 is about 36359.3179253957. The cubic root of 1322000000 is about 1097.5150517772.

Adding to 1322000000 its reverse (2231), we get a palindrome (1322002231).

The spelling of 1322000000 in words is "one billion, three hundred twenty-two million", and thus it is an aban number.