338689 has 4 divisors (see below), whose sum is σ = 364756. Its totient is φ = 312624.

The previous prime is 338687. The next prime is 338707. The reversal of 338689 is 986833.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 986833 = 17 ⋅58049.

It can be written as a sum of positive squares in 2 ways, for example, as 166464 + 172225 = 408^2 + 415^2 .

It is not a de Polignac number, because 338689 - 2¹ = 338687 is a prime.

It is a super-2 number, since 2×338689² = 229420477442, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (338683) 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, 13014 + ... + 13039.

It is an arithmetic number, because the mean of its divisors is an integer number (91189).

2³³⁸⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

338689 is a deficient number, since it is larger than the sum of its proper divisors (26067).

338689 is a wasteful number, since it uses less digits than its factorization.

338689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26066.

The product of its digits is 31104, while the sum is 37.

The square root of 338689 is about 581.9699304947. The cubic root of 338689 is about 69.7054974061.

The spelling of 338689 in words is "three hundred thirty-eight thousand, six hundred eighty-nine".