135408 has 80 divisors (see below), whose sum is σ = 444416. Its totient is φ = 34560.
The previous prime is 135403. The next prime is 135409. The reversal of 135408 is 804531.
It is a Harshad number since it is a multiple of its sum of digits (21).
It is a nialpdrome in base 12.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (135403) by changing a digit.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4353 + ... + 4383.
2135408 is an apocalyptic number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 135408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222208).
135408 is an abundant number, since it is smaller than the sum of its proper divisors (309008).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
135408 is a wasteful number, since it uses less digits than its factorization.
135408 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 62 (or 56 counting only the distinct ones).
The product of its (nonzero) digits is 480, while the sum is 21.
The square root of 135408 is about 367.9782602274. The cubic root of 135408 is about 51.3509056985.
Adding to 135408 its reverse (804531), we get a palindrome (939939).
The spelling of 135408 in words is "one hundred thirty-five thousand, four hundred eight".
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