728343 has 24 divisors (see below), whose sum is σ = 1312896. Its totient is φ = 378000.

The previous prime is 728333. The next prime is 728369. The reversal of 728343 is 343827.

It is not a de Polignac number, because 728343 - 2⁸ = 728087 is a prime.

It is an Ulam number.

It is a congruent number.

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

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 23 ways as a sum of consecutive naturals, for example, 168 + ... + 1218.

It is an arithmetic number, because the mean of its divisors is an integer number (54704).

2⁷²⁸³⁴³ is an apocalyptic number.

728343 is a deficient number, since it is larger than the sum of its proper divisors (584553).

728343 is a wasteful number, since it uses less digits than its factorization.

728343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1075 (or 1072 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 728343 is about 853.4301377383. The cubic root of 728343 is about 89.9729548367.

The spelling of 728343 in words is "seven hundred twenty-eight thousand, three hundred forty-three".