138234 has 8 divisors (see below), whose sum is σ = 276480. Its totient is φ = 46076.

The previous prime is 138209. The next prime is 138239. The reversal of 138234 is 432831.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

138234 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 138234.

It is not an unprimeable number, because it can be changed into a prime (138239) by changing a digit.

138234 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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, 11514 + ... + 11525.

It is an arithmetic number, because the mean of its divisors is an integer number (34560).

2¹³⁸²³⁴ is an apocalyptic number.

138234 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138234 is a wasteful number, since it uses less digits than its factorization.

138234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23044.

The product of its digits is 576, while the sum is 21.

The square root of 138234 is about 371.7983324331. The cubic root of 138234 is about 51.7056844823.

The spelling of 138234 in words is "one hundred thirty-eight thousand, two hundred thirty-four".