135268728 has 64 divisors (see below), whose sum is σ = 409224960. Its totient is φ = 36374016.

The previous prime is 135268723. The next prime is 135268729. The reversal of 135268728 is 827862531.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 135268728.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135268723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20826 + ... + 26537.

It is an arithmetic number, because the mean of its divisors is an integer number (6394140).

Almost surely, 2^135268728 is an apocalyptic number.

It is an amenable number.

135268728 is an abundant number, since it is smaller than the sum of its proper divisors (273956232).

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

135268728 is a wasteful number, since it uses less digits than its factorization.

135268728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47396 (or 47392 counting only the distinct ones).

The product of its digits is 161280, while the sum is 42.

The square root of 135268728 is about 11630.5085013511. The cubic root of 135268728 is about 513.3329424108.

The spelling of 135268728 in words is "one hundred thirty-five million, two hundred sixty-eight thousand, seven hundred twenty-eight".