728033 has 4 divisors (see below), whose sum is σ = 745008. Its totient is φ = 711060.

The previous prime is 728027. The next prime is 728047. The reversal of 728033 is 330827.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 728033 - 2⁴ = 728017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (728003) 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 3 ways as a sum of consecutive naturals, for example, 8423 + ... + 8508.

It is an arithmetic number, because the mean of its divisors is an integer number (186252).

2⁷²⁸⁰³³ is an apocalyptic number.

It is an amenable number.

728033 is a deficient number, since it is larger than the sum of its proper divisors (16975).

728033 is a wasteful number, since it uses less digits than its factorization.

728033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16974.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 728033 is about 853.2484983872. The cubic root of 728033 is about 89.9601881530.

The spelling of 728033 in words is "seven hundred twenty-eight thousand, thirty-three".