135287868 has 12 divisors (see below), whose sum is σ = 315671720. Its totient is φ = 45095952.

The previous prime is 135287849. The next prime is 135287897. The reversal of 135287868 is 868782531.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5636983 + ... + 5637006.

Almost surely, 2^135287868 is an apocalyptic number.

It is an amenable number.

135287868 is an abundant number, since it is smaller than the sum of its proper divisors (180383852).

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

135287868 is a wasteful number, since it uses less digits than its factorization.

135287868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11273996 (or 11273994 counting only the distinct ones).

The product of its digits is 645120, while the sum is 48.

The square root of 135287868 is about 11631.3313081521. The cubic root of 135287868 is about 513.3571528086.

The spelling of 135287868 in words is "one hundred thirty-five million, two hundred eighty-seven thousand, eight hundred sixty-eight".