135991268 has 24 divisors (see below), whose sum is σ = 277536000. Its totient is φ = 58281384.

The previous prime is 135991253. The next prime is 135991277. The reversal of 135991268 is 862199531.

It is a happy number.

135991268 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48188 + ... + 50931.

It is an arithmetic number, because the mean of its divisors is an integer number (11564000).

Almost surely, 2^135991268 is an apocalyptic number.

It is an amenable number.

135991268 is an abundant number, since it is smaller than the sum of its proper divisors (141544732).

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

135991268 is an equidigital number, since it uses as much as digits as its factorization.

135991268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99144 (or 99128 counting only the distinct ones).

The product of its digits is 116640, while the sum is 44.

The square root of 135991268 is about 11661.5294022697. The cubic root of 135991268 is about 514.2453118025.

The spelling of 135991268 in words is "one hundred thirty-five million, nine hundred ninety-one thousand, two hundred sixty-eight".