135139408 has 20 divisors (see below), whose sum is σ = 262170720. Its totient is φ = 67482464.

The previous prime is 135139397. The next prime is 135139423. The reversal of 135139408 is 804931531.

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, 8391 + ... + 18457.

It is an arithmetic number, because the mean of its divisors is an integer number (13108536).

Almost surely, 2^135139408 is an apocalyptic number.

135139408 is the 6712-nd octagonal number.

It is an amenable number.

135139408 is a deficient number, since it is larger than the sum of its proper divisors (127031312).

135139408 is a wasteful number, since it uses less digits than its factorization.

135139408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10914 (or 10908 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 135139408 is about 11624.9476557961. The cubic root of 135139408 is about 513.1693042384.

The spelling of 135139408 in words is "one hundred thirty-five million, one hundred thirty-nine thousand, four hundred eight".