728930 has 8 divisors (see below), whose sum is σ = 1312092. Its totient is φ = 291568.

The previous prime is 728929. The next prime is 728941. The reversal of 728930 is 39827.

It can be written as a sum of positive squares in 2 ways, for example, as 619369 + 109561 = 787^2 + 331^2 .

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 728893 and 728902.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36437 + ... + 36456.

728930 is a Friedman number, since it can be written as (9*(8+2))^3-70, using all its digits and the basic arithmetic operations.

2⁷²⁸⁹³⁰ is an apocalyptic number.

728930 is a deficient number, since it is larger than the sum of its proper divisors (583162).

728930 is a wasteful number, since it uses less digits than its factorization.

728930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72900.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 728930 is about 853.7739747732. The cubic root of 728930 is about 89.9971192494.

The spelling of 728930 in words is "seven hundred twenty-eight thousand, nine hundred thirty".