538865 has 4 divisors (see below), whose sum is σ = 646644. Its totient is φ = 431088.

The previous prime is 538841. The next prime is 538871. The reversal of 538865 is 568835.

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 97969 + 440896 = 313^2 + 664^2 .

It is a cyclic number.

It is not a de Polignac number, because 538865 - 2⁶ = 538801 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53882 + ... + 53891.

It is an arithmetic number, because the mean of its divisors is an integer number (161661).

2⁵³⁸⁸⁶⁵ is an apocalyptic number.

It is an amenable number.

538865 is a deficient number, since it is larger than the sum of its proper divisors (107779).

538865 is a wasteful number, since it uses less digits than its factorization.

538865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107778.

The product of its digits is 28800, while the sum is 35.

The square root of 538865 is about 734.0742469260. The cubic root of 538865 is about 81.3754354418.

The spelling of 538865 in words is "five hundred thirty-eight thousand, eight hundred sixty-five".