136528 has 40 divisors (see below), whose sum is σ = 321408. Its totient is φ = 54912.

The previous prime is 136523. The next prime is 136531. The reversal of 136528 is 825631.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136523) by changing a digit.

136528 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2550 + ... + 2602.

2¹³⁶⁵²⁸ 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 136528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (160704).

136528 is an abundant number, since it is smaller than the sum of its proper divisors (184880).

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

136528 is a wasteful number, since it uses less digits than its factorization.

136528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91 (or 85 counting only the distinct ones).

The product of its digits is 1440, while the sum is 25.

The square root of 136528 is about 369.4969553325. The cubic root of 136528 is about 51.4920966915.

Subtracting from 136528 its sum of digits (25), we obtain a triangular number (136503 = T₅₂₂).

The spelling of 136528 in words is "one hundred thirty-six thousand, five hundred twenty-eight".