728559 has 18 divisors (see below), whose sum is σ = 1141920. Its totient is φ = 447408.

The previous prime is 728557. The next prime is 728561. The reversal of 728559 is 955827.

It is an interprime number because it is at equal distance from previous prime (728557) and next prime (728561).

It is not a de Polignac number, because 728559 - 2¹ = 728557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728551) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1282 + ... + 1760.

It is an arithmetic number, because the mean of its divisors is an integer number (63440).

2⁷²⁸⁵⁵⁹ is an apocalyptic number.

728559 is a deficient number, since it is larger than the sum of its proper divisors (413361).

728559 is a wasteful number, since it uses less digits than its factorization.

728559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511 (or 495 counting only the distinct ones).

The product of its digits is 25200, while the sum is 36.

The square root of 728559 is about 853.5566765013. The cubic root of 728559 is about 89.9818481911.

The spelling of 728559 in words is "seven hundred twenty-eight thousand, five hundred fifty-nine".