289138 has 4 divisors (see below), whose sum is σ = 433710. Its totient is φ = 144568.

The previous prime is 289129. The next prime is 289139. The reversal of 289138 is 831982.

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

It can be written as a sum of positive squares in only one way, i.e., 154449 + 134689 = 393^2 + 367^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (289139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72283 + ... + 72286.

2²⁸⁹¹³⁸ is an apocalyptic number.

289138 is a deficient number, since it is larger than the sum of its proper divisors (144572).

289138 is a wasteful number, since it uses less digits than its factorization.

289138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144571.

The product of its digits is 3456, while the sum is 31.

The square root of 289138 is about 537.7155381798. The cubic root of 289138 is about 66.1254119873.

The spelling of 289138 in words is "two hundred eighty-nine thousand, one hundred thirty-eight".