330728 has 8 divisors (see below), whose sum is σ = 620130. Its totient is φ = 165360.

The previous prime is 330721. The next prime is 330731. The reversal of 330728 is 827033.

330728 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 315844 + 14884 = 562^2 + 122^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 330728.

It is not an unprimeable number, because it can be changed into a prime (330721) by changing a digit.

330728 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20663 + ... + 20678.

2³³⁰⁷²⁸ is an apocalyptic number.

It is an amenable number.

330728 is a deficient number, since it is larger than the sum of its proper divisors (289402).

330728 is a wasteful number, since it uses less digits than its factorization.

330728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41347 (or 41343 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 330728 is about 575.0895582429. The cubic root of 330728 is about 69.1550110196.

The spelling of 330728 in words is "three hundred thirty thousand, seven hundred twenty-eight".