830728 has 8 divisors (see below), whose sum is σ = 1557630. Its totient is φ = 415360.

The previous prime is 830719. The next prime is 830729. The reversal of 830728 is 827038.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 669124 + 161604 = 818^2 + 402^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 830696 and 830705.

It is not an unprimeable number, because it can be changed into a prime (830729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51913 + ... + 51928.

2⁸³⁰⁷²⁸ is an apocalyptic number.

It is an amenable number.

830728 is a deficient number, since it is larger than the sum of its proper divisors (726902).

830728 is a wasteful number, since it uses less digits than its factorization.

830728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103847 (or 103843 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 830728 is about 911.4428122488. The cubic root of 830728 is about 94.0054320084.

The spelling of 830728 in words is "eight hundred thirty thousand, seven hundred twenty-eight".