728603 has 4 divisors (see below), whose sum is σ = 771480. Its totient is φ = 685728.

The previous prime is 728579. The next prime is 728627. The reversal of 728603 is 306827.

728603 is nontrivially palindromic in base 16.

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

It is an interprime number because it is at equal distance from previous prime (728579) and next prime (728627).

It is a cyclic number.

It is not a de Polignac number, because 728603 - 2¹⁴ = 712219 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, 21413 + ... + 21446.

It is an arithmetic number, because the mean of its divisors is an integer number (192870).

2⁷²⁸⁶⁰³ is an apocalyptic number.

728603 is a deficient number, since it is larger than the sum of its proper divisors (42877).

728603 is a wasteful number, since it uses less digits than its factorization.

728603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42876.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 728603 is about 853.5824506162. The cubic root of 728603 is about 89.9836595849.

It can be divided in two parts, 728 and 603, that added together give a palindrome (1331).

The spelling of 728603 in words is "seven hundred twenty-eight thousand, six hundred three".