538889 has 4 divisors (see below), whose sum is σ = 580356. Its totient is φ = 497424.

The previous prime is 538877. The next prime is 538921. The reversal of 538889 is 988835.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 988835 = 5 ⋅197767.

It can be written as a sum of positive squares in 2 ways, for example, as 60025 + 478864 = 245^2 + 692^2 .

It is a cyclic number.

It is not a de Polignac number, because 538889 - 2¹⁶ = 473353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (538829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20714 + ... + 20739.

It is an arithmetic number, because the mean of its divisors is an integer number (145089).

2⁵³⁸⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

538889 is a deficient number, since it is larger than the sum of its proper divisors (41467).

538889 is a wasteful number, since it uses less digits than its factorization.

538889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41466.

The product of its digits is 69120, while the sum is 41.

The square root of 538889 is about 734.0905938643. The cubic root of 538889 is about 81.3766435251.

The spelling of 538889 in words is "five hundred thirty-eight thousand, eight hundred eighty-nine".