538805 has 4 divisors (see below), whose sum is σ = 646572. Its totient is φ = 431040.

The previous prime is 538801. The next prime is 538817. The reversal of 538805 is 508835.

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 198916 + 339889 = 446^2 + 583^2 .

It is not a de Polignac number, because 538805 - 2² = 538801 is a prime.

It is an Ulam number.

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 538805.

It is not an unprimeable number, because it can be changed into a prime (538801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53876 + ... + 53885.

It is an arithmetic number, because the mean of its divisors is an integer number (161643).

2⁵³⁸⁸⁰⁵ is an apocalyptic number.

It is an amenable number.

538805 is a deficient number, since it is larger than the sum of its proper divisors (107767).

538805 is a wasteful number, since it uses less digits than its factorization.

538805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107766.

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 538805 is about 734.0333779877. The cubic root of 538805 is about 81.3724150766.

The spelling of 538805 in words is "five hundred thirty-eight thousand, eight hundred five".