1328303720 has 32 divisors (see below), whose sum is σ = 2989827720. Its totient is φ = 531118080.

The previous prime is 1328303719. The next prime is 1328303723. The reversal of 1328303720 is 273038231.

It can be written as a sum of positive squares in 4 ways, for example, as 1148260996 + 180042724 = 33886^2 + 13418^2 .

It is not an unprimeable number, because it can be changed into a prime (1328303723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142400 + ... + 151440.

Almost surely, 2^1328303720 is an apocalyptic number.

1328303720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1328303720 is an abundant number, since it is smaller than the sum of its proper divisors (1661524000).

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

1328303720 is a wasteful number, since it uses less digits than its factorization.

1328303720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12725 (or 12721 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 1328303720 is about 36445.9012784703. The cubic root of 1328303720 is about 1099.2567210139.

The spelling of 1328303720 in words is "one billion, three hundred twenty-eight million, three hundred three thousand, seven hundred twenty".