230728 has 16 divisors (see below), whose sum is σ = 437760. Its totient is φ = 114000.

The previous prime is 230719. The next prime is 230729. The reversal of 230728 is 827032.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 230699 and 230708.

It is not an unprimeable number, because it can be changed into a prime (230729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1113 + ... + 1303.

It is an arithmetic number, because the mean of its divisors is an integer number (27360).

2²³⁰⁷²⁸ is an apocalyptic number.

It is an amenable number.

230728 is a deficient number, since it is larger than the sum of its proper divisors (207032).

230728 is a wasteful number, since it uses less digits than its factorization.

230728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348 (or 344 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 230728 is about 480.3415451530. The cubic root of 230728 is about 61.3338321741. Note that the first 3 decimals are identical.

The spelling of 230728 in words is "two hundred thirty thousand, seven hundred twenty-eight".