728539205 has 4 divisors (see below), whose sum is σ = 874247052. Its totient is φ = 582831360.

The previous prime is 728539187. The next prime is 728539243. The reversal of 728539205 is 502935827.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 505395361 + 223143844 = 22481^2 + 14938^2 .

It is not a de Polignac number, because 728539205 - 2²⁴ = 711761989 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 72853916 + ... + 72853925.

It is an arithmetic number, because the mean of its divisors is an integer number (218561763).

Almost surely, 2^728539205 is an apocalyptic number.

It is an amenable number.

728539205 is a deficient number, since it is larger than the sum of its proper divisors (145707847).

728539205 is a wasteful number, since it uses less digits than its factorization.

728539205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145707846.

The product of its (nonzero) digits is 151200, while the sum is 41.

The square root of 728539205 is about 26991.4654103848. The cubic root of 728539205 is about 899.8103324599.

The spelling of 728539205 in words is "seven hundred twenty-eight million, five hundred thirty-nine thousand, two hundred five".