1330321220 has 24 divisors (see below), whose sum is σ = 2820801984. Its totient is φ = 526961376.

The previous prime is 1330321217. The next prime is 1330321241. The reversal of 1330321220 is 221230331.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 320834 + ... + 324953.

It is an arithmetic number, because the mean of its divisors is an integer number (117533416).

Almost surely, 2^1330321220 is an apocalyptic number.

1330321220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1330321220 is an abundant number, since it is smaller than the sum of its proper divisors (1490480764).

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

1330321220 is a wasteful number, since it uses less digits than its factorization.

1330321220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645899 (or 645897 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 1330321220 is about 36473.5687861772. The cubic root of 1330321220 is about 1099.8129764683.

Adding to 1330321220 its reverse (221230331), we get a palindrome (1551551551).

The spelling of 1330321220 in words is "one billion, three hundred thirty million, three hundred twenty-one thousand, two hundred twenty".