135438 has 8 divisors (see below), whose sum is σ = 270888. Its totient is φ = 45144.

The previous prime is 135433. The next prime is 135449. The reversal of 135438 is 834531.

135438 is nontrivially palindromic in base 12.

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

135438 is an admirable number.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 135438.

It is not an unprimeable number, because it can be changed into a prime (135431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11281 + ... + 11292.

It is an arithmetic number, because the mean of its divisors is an integer number (33861).

2¹³⁵⁴³⁸ is an apocalyptic number.

135438 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.

135438 is a wasteful number, since it uses less digits than its factorization.

135438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22578.

The product of its digits is 1440, while the sum is 24.

The square root of 135438 is about 368.0190212475. The cubic root of 135438 is about 51.3546977281.

Adding to 135438 its reverse (834531), we get a palindrome (969969).

The spelling of 135438 in words is "one hundred thirty-five thousand, four hundred thirty-eight".