1330728 has 48 divisors (see below), whose sum is σ = 3845280. Its totient is φ = 375936.

The previous prime is 1330727. The next prime is 1330733. The reversal of 1330728 is 8270331.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 1330698 and 1330707.

It is not an unprimeable number, because it can be changed into a prime (1330727) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14908 + ... + 14996.

It is an arithmetic number, because the mean of its divisors is an integer number (80110).

2^1330728 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 1330728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1922640).

1330728 is an abundant number, since it is smaller than the sum of its proper divisors (2514552).

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

1330728 is an equidigital number, since it uses as much as digits as its factorization.

1330728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194 (or 101 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 1330728 is about 1153.5718443166. The cubic root of 1330728 is about 109.9925063766.

The spelling of 1330728 in words is "one million, three hundred thirty thousand, seven hundred twenty-eight".