135809408 has 32 divisors (see below), whose sum is σ = 309210960. Its totient is φ = 58203648.

The previous prime is 135809383. The next prime is 135809417. The reversal of 135809408 is 804908531.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable 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, 74891 + ... + 76682.

Almost surely, 2^135809408 is an apocalyptic number.

It is an amenable number.

135809408 is an abundant number, since it is smaller than the sum of its proper divisors (173401552).

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

135809408 is an equidigital number, since it uses as much as digits as its factorization.

135809408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151594 (or 151582 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 135809408 is about 11653.7293601662. The cubic root of 135809408 is about 514.0159775398.

The spelling of 135809408 in words is "one hundred thirty-five million, eight hundred nine thousand, four hundred eight".