135908 has 12 divisors (see below), whose sum is σ = 242172. Its totient is φ = 66720.

The previous prime is 135899. The next prime is 135911. The reversal of 135908 is 809531.

It can be written as a sum of positive squares in 2 ways, for example, as 7744 + 128164 = 88^2 + 358^2 .

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 135908.

It is an unprimeable number.

135908 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 (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35 + ... + 522.

It is an arithmetic number, because the mean of its divisors is an integer number (20181).

2¹³⁵⁹⁰⁸ is an apocalyptic number.

It is an amenable number.

135908 is a deficient number, since it is larger than the sum of its proper divisors (106264).

135908 is a wasteful number, since it uses less digits than its factorization.

135908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622 (or 620 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 135908 is about 368.6570221764. The cubic root of 135908 is about 51.4140332216.

The spelling of 135908 in words is "one hundred thirty-five thousand, nine hundred eight".