728535 has 16 divisors (see below), whose sum is σ = 1234656. Its totient is φ = 365568.

The previous prime is 728527. The next prime is 728537. The reversal of 728535 is 535827.

It is a happy number.

It is not a de Polignac number, because 728535 - 2³ = 728527 is a prime.

728535 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1174 + ... + 1683.

It is an arithmetic number, because the mean of its divisors is an integer number (77166).

2⁷²⁸⁵³⁵ is an apocalyptic number.

728535 is a deficient number, since it is larger than the sum of its proper divisors (506121).

728535 is a wasteful number, since it uses less digits than its factorization.

728535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2882.

The product of its digits is 8400, while the sum is 30.

The square root of 728535 is about 853.5426175652. The cubic root of 728535 is about 89.9808601274.

The spelling of 728535 in words is "seven hundred twenty-eight thousand, five hundred thirty-five".