135709028 has 108 divisors (see below), whose sum is σ = 318062052. Its totient is φ = 50319360.

The previous prime is 135709019. The next prime is 135709061. The reversal of 135709028 is 820907531.

It can be written as a sum of positive squares in 6 ways, for example, as 1658944 + 134050084 = 1288^2 + 11578^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 562988 + ... + 563228.

It is an arithmetic number, because the mean of its divisors is an integer number (2945019).

Almost surely, 2^135709028 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 135709028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159031026).

135709028 is an abundant number, since it is smaller than the sum of its proper divisors (182353024).

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

135709028 is a wasteful number, since it uses less digits than its factorization.

135709028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302 (or 280 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 135709028 is about 11649.4217882262. The cubic root of 135709028 is about 513.8893058019.

The spelling of 135709028 in words is "one hundred thirty-five million, seven hundred nine thousand, twenty-eight".