338591 has 4 divisors (see below), whose sum is σ = 369384. Its totient is φ = 307800.

The previous prime is 338581. The next prime is 338609. The reversal of 338591 is 195833.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-338591 is a prime.

It is a super-2 number, since 2×338591² = 229287730562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (338531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15380 + ... + 15401.

It is an arithmetic number, because the mean of its divisors is an integer number (92346).

2³³⁸⁵⁹¹ is an apocalyptic number.

338591 is a deficient number, since it is larger than the sum of its proper divisors (30793).

338591 is a wasteful number, since it uses less digits than its factorization.

338591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30792.

The product of its digits is 3240, while the sum is 29.

The square root of 338591 is about 581.8857276132. The cubic root of 338591 is about 69.6987736391.

It can be divided in two parts, 338 and 591, that added together give a palindrome (929).

The spelling of 338591 in words is "three hundred thirty-eight thousand, five hundred ninety-one".