728525 has 24 divisors (see below), whose sum is σ = 1083264. Its totient is φ = 475200.

The previous prime is 728521. The next prime is 728527. The reversal of 728525 is 525827.

It is not a de Polignac number, because 728525 - 2² = 728521 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3935 + ... + 4115.

It is an arithmetic number, because the mean of its divisors is an integer number (45136).

2⁷²⁸⁵²⁵ is an apocalyptic number.

It is an amenable number.

728525 is a deficient number, since it is larger than the sum of its proper divisors (354739).

728525 is a wasteful number, since it uses less digits than its factorization.

728525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221 (or 216 counting only the distinct ones).

The product of its digits is 5600, while the sum is 29.

The square root of 728525 is about 853.5367596068. The cubic root of 728525 is about 89.9804484278.

The spelling of 728525 in words is "seven hundred twenty-eight thousand, five hundred twenty-five".