135989656 has 32 divisors (see below), whose sum is σ = 281984400. Its totient is φ = 60963840.

The previous prime is 135989629. The next prime is 135989657. The reversal of 135989656 is 656989531.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135989657) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4161 + ... + 17008.

Almost surely, 2^135989656 is an apocalyptic number.

It is an amenable number.

135989656 is an abundant number, since it is smaller than the sum of its proper divisors (145994744).

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

135989656 is a wasteful number, since it uses less digits than its factorization.

135989656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21259 (or 21255 counting only the distinct ones).

The product of its digits is 1749600, while the sum is 52.

The square root of 135989656 is about 11661.4602859162. The cubic root of 135989656 is about 514.2432798909.

The spelling of 135989656 in words is "one hundred thirty-five million, nine hundred eighty-nine thousand, six hundred fifty-six".