728493 has 8 divisors (see below), whose sum is σ = 997728. Its totient is φ = 472464.

The previous prime is 728489. The next prime is 728521. The reversal of 728493 is 394827.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 728493 - 2² = 728489 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3171 + ... + 3392.

It is an arithmetic number, because the mean of its divisors is an integer number (124716).

2⁷²⁸⁴⁹³ is an apocalyptic number.

It is an amenable number.

728493 is a deficient number, since it is larger than the sum of its proper divisors (269235).

728493 is a wasteful number, since it uses less digits than its factorization.

728493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6603.

The product of its digits is 12096, while the sum is 33.

The square root of 728493 is about 853.5180138697. The cubic root of 728493 is about 89.9791309638.

It can be divided in two parts, 728 and 493, that added together give a palindrome (1221).

The spelling of 728493 in words is "seven hundred twenty-eight thousand, four hundred ninety-three".