728717 has 8 divisors (see below), whose sum is σ = 820992. Its totient is φ = 640800.

The previous prime is 728713. The next prime is 728723. The reversal of 728717 is 717827.

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

It is a cyclic number.

It is not a de Polignac number, because 728717 - 2² = 728713 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 728717.

It is not an unprimeable number, because it can be changed into a prime (728713) 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 7 ways as a sum of consecutive naturals, for example, 728 + ... + 1409.

It is an arithmetic number, because the mean of its divisors is an integer number (102624).

2⁷²⁸⁷¹⁷ is an apocalyptic number.

It is an amenable number.

728717 is a deficient number, since it is larger than the sum of its proper divisors (92275).

728717 is a wasteful number, since it uses less digits than its factorization.

728717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2179.

The product of its digits is 5488, while the sum is 32.

The square root of 728717 is about 853.6492253848. The cubic root of 728717 is about 89.9883524021.

The spelling of 728717 in words is "seven hundred twenty-eight thousand, seven hundred seventeen".