135394728 has 64 divisors (see below), whose sum is σ = 392325120. Its totient is φ = 38136000.

The previous prime is 135394717. The next prime is 135394747. The reversal of 135394728 is 827493531.

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 135394728.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6253 + ... + 17603.

It is an arithmetic number, because the mean of its divisors is an integer number (6130080).

Almost surely, 2^135394728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 135394728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196162560).

135394728 is an abundant number, since it is smaller than the sum of its proper divisors (256930392).

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

135394728 is a wasteful number, since it uses less digits than its factorization.

135394728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11438 (or 11434 counting only the distinct ones).

The product of its digits is 181440, while the sum is 42.

The square root of 135394728 is about 11635.9240286279. The cubic root of 135394728 is about 513.4922792593.

The spelling of 135394728 in words is "one hundred thirty-five million, three hundred ninety-four thousand, seven hundred twenty-eight".