728330 has 16 divisors (see below), whose sum is σ = 1321704. Its totient is φ = 288960.

The previous prime is 728317. The next prime is 728333. The reversal of 728330 is 33827.

It can be written as a sum of positive squares in 4 ways, for example, as 508369 + 219961 = 713^2 + 469^2 .

It is a junction number, because it is equal to n+sod(n) for n = 728296 and 728305.

It is not an unprimeable number, because it can be changed into a prime (728333) 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, 1520 + ... + 1940.

2⁷²⁸³³⁰ is an apocalyptic number.

728330 is a deficient number, since it is larger than the sum of its proper divisors (593374).

728330 is a wasteful number, since it uses less digits than its factorization.

728330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601.

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

The square root of 728330 is about 853.4225213808. The cubic root of 728330 is about 89.9724195324.

The spelling of 728330 in words is "seven hundred twenty-eight thousand, three hundred thirty".