136728 has 40 divisors (see below), whose sum is σ = 384780. Its totient is φ = 45360.

The previous prime is 136727. The next prime is 136733. The reversal of 136728 is 827631.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136727) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 543 + ... + 753.

2¹³⁶⁷²⁸ is an apocalyptic number.

136728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 136728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (192390).

136728 is an abundant number, since it is smaller than the sum of its proper divisors (248052).

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

136728 is a wasteful number, since it uses less digits than its factorization.

136728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229 (or 216 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 136728 is about 369.7674945151. The cubic root of 136728 is about 51.5172280314.

The spelling of 136728 in words is "one hundred thirty-six thousand, seven hundred twenty-eight".