135988680 has 32 divisors (see below), whose sum is σ = 407966400. Its totient is φ = 36263616.

The previous prime is 135988669. The next prime is 135988693. The reversal of 135988680 is 86889531.

It is a plaindrome in base 13.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 566500 + ... + 566739.

It is an arithmetic number, because the mean of its divisors is an integer number (12748950).

Almost surely, 2^135988680 is an apocalyptic number.

135988680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

135988680 is an abundant number, since it is smaller than the sum of its proper divisors (271977720).

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

135988680 is a wasteful number, since it uses less digits than its factorization.

135988680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1133253 (or 1133249 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 48.

The square root of 135988680 is about 11661.4184385949. The cubic root of 135988680 is about 514.2420496438.

The spelling of 135988680 in words is "one hundred thirty-five million, nine hundred eighty-eight thousand, six hundred eighty".