1000322320 has 20 divisors (see below), whose sum is σ = 2325749580. Its totient is φ = 400128896.

The previous prime is 1000322293. The next prime is 1000322327. The reversal of 1000322320 is 232230001.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 237899776 + 762422544 = 15424^2 + 27612^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 1000322320.

It is not an unprimeable number, because it can be changed into a prime (1000322327) 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 3 ways as a sum of consecutive naturals, for example, 6251935 + ... + 6252094.

It is an arithmetic number, because the mean of its divisors is an integer number (116287479).

Almost surely, 2^1000322320 is an apocalyptic number.

1000322320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000322320 is an abundant number, since it is smaller than the sum of its proper divisors (1325427260).

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

1000322320 is a wasteful number, since it uses less digits than its factorization.

1000322320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12504042 (or 12504036 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 1000322320 is about 31627.8725177651. The cubic root of 1000322320 is about 1000.1074284587.

Adding to 1000322320 its reverse (232230001), we get a palindrome (1232552321).

It can be divided in two parts, 10003 and 22320, that added together give a palindrome (32323).

The spelling of 1000322320 in words is "one billion, three hundred twenty-two thousand, three hundred twenty".