728393 has 4 divisors (see below), whose sum is σ = 753540. Its totient is φ = 703248.

The previous prime is 728383. The next prime is 728417. The reversal of 728393 is 393827.

728393 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 405769 + 322624 = 637^2 + 568^2 .

It is a cyclic number.

It is not a de Polignac number, because 728393 - 2¹⁰ = 727369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (728303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12530 + ... + 12587.

It is an arithmetic number, because the mean of its divisors is an integer number (188385).

2⁷²⁸³⁹³ is an apocalyptic number.

It is an amenable number.

728393 is a deficient number, since it is larger than the sum of its proper divisors (25147).

728393 is a wasteful number, since it uses less digits than its factorization.

728393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25146.

The product of its digits is 9072, while the sum is 32.

The square root of 728393 is about 853.4594307874. The cubic root of 728393 is about 89.9750136399.

The spelling of 728393 in words is "seven hundred twenty-eight thousand, three hundred ninety-three".