728043 has 4 divisors (see below), whose sum is σ = 970728. Its totient is φ = 485360.

The previous prime is 728027. The next prime is 728047. The reversal of 728043 is 340827.

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

It is a cyclic number.

It is not a de Polignac number, because 728043 - 2⁴ = 728027 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (728047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121338 + ... + 121343.

It is an arithmetic number, because the mean of its divisors is an integer number (242682).

2⁷²⁸⁰⁴³ is an apocalyptic number.

728043 is a deficient number, since it is larger than the sum of its proper divisors (242685).

728043 is a wasteful number, since it uses less digits than its factorization.

728043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242684.

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 728043 is about 853.2543583246. The cubic root of 728043 is about 89.9606000381.

The spelling of 728043 in words is "seven hundred twenty-eight thousand, forty-three".