135618728 has 32 divisors (see below), whose sum is σ = 292915200. Its totient is φ = 57661632.

The previous prime is 135618709. The next prime is 135618737. The reversal of 135618728 is 827816531.

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, 2423 + ... + 16646.

It is an arithmetic number, because the mean of its divisors is an integer number (9153600).

Almost surely, 2^135618728 is an apocalyptic number.

It is an amenable number.

135618728 is an abundant number, since it is smaller than the sum of its proper divisors (157296472).

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

135618728 is a wasteful number, since it uses less digits than its factorization.

135618728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19209 (or 19205 counting only the distinct ones).

The product of its digits is 80640, while the sum is 41.

The square root of 135618728 is about 11645.5454144493. The cubic root of 135618728 is about 513.7753008577.

The spelling of 135618728 in words is "one hundred thirty-five million, six hundred eighteen thousand, seven hundred twenty-eight".