135658728 has 48 divisors (see below), whose sum is σ = 379267200. Its totient is φ = 43760160.

The previous prime is 135658717. The next prime is 135658801. The reversal of 135658728 is 827856531.

135658728 is a `hidden beast` number, since 1 + 3 + 565 + 87 + 2 + 8 = 666.

135658728 is digitally balanced in base 2, 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 (45) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28158 + ... + 32621.

It is an arithmetic number, because the mean of its divisors is an integer number (7901400).

Almost surely, 2^135658728 is an apocalyptic number.

135658728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

135658728 is an abundant number, since it is smaller than the sum of its proper divisors (243608472).

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

135658728 is a wasteful number, since it uses less digits than its factorization.

135658728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60822 (or 60815 counting only the distinct ones).

The product of its digits is 403200, while the sum is 45.

The square root of 135658728 is about 11647.2626827079. The cubic root of 135658728 is about 513.8258076282.

The spelling of 135658728 in words is "one hundred thirty-five million, six hundred fifty-eight thousand, seven hundred twenty-eight".