728830 has 8 divisors (see below), whose sum is σ = 1311912. Its totient is φ = 291528.

The previous prime is 728813. The next prime is 728831. The reversal of 728830 is 38827.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728831) by changing a digit.

728830 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 in 3 ways as a sum of consecutive naturals, for example, 36432 + ... + 36451.

It is an arithmetic number, because the mean of its divisors is an integer number (163989).

2⁷²⁸⁸³⁰ is an apocalyptic number.

728830 is a deficient number, since it is larger than the sum of its proper divisors (583082).

728830 is a wasteful number, since it uses less digits than its factorization.

728830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72890.

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

The square root of 728830 is about 853.7154092553. The cubic root of 728830 is about 89.9930035714.

The spelling of 728830 in words is "seven hundred twenty-eight thousand, eight hundred thirty".