1328303728 has 40 divisors (see below), whose sum is σ = 2692961568. Its totient is φ = 633507072.

The previous prime is 1328303723. The next prime is 1328303747. The reversal of 1328303728 is 8273038231.

It is a congruent number.

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, 132426 + ... + 142102.

Almost surely, 2^1328303728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1328303728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1346480784).

1328303728 is an abundant number, since it is smaller than the sum of its proper divisors (1364657840).

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

1328303728 is a wasteful number, since it uses less digits than its factorization.

1328303728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10081 (or 10075 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 1328303728 is about 36445.9013882220. The cubic root of 1328303728 is about 1099.2567232208.

The spelling of 1328303728 in words is "one billion, three hundred twenty-eight million, three hundred three thousand, seven hundred twenty-eight".