135691028 has 24 divisors (see below), whose sum is σ = 259843584. Its totient is φ = 61488000.

The previous prime is 135691001. The next prime is 135691033. The reversal of 135691028 is 820196531.

135691028 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 10253 + ... + 19403.

It is an arithmetic number, because the mean of its divisors is an integer number (10826816).

Almost surely, 2^135691028 is an apocalyptic number.

It is an amenable number.

135691028 is a deficient number, since it is larger than the sum of its proper divisors (124152556).

135691028 is a wasteful number, since it uses less digits than its factorization.

135691028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9503 (or 9501 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 135691028 is about 11648.6491920737. The cubic root of 135691028 is about 513.8665846004.

The spelling of 135691028 in words is "one hundred thirty-five million, six hundred ninety-one thousand, twenty-eight".