135636228 has 192 divisors, whose sum is σ = 445688320. Its totient is φ = 34712064.

The previous prime is 135636223. The next prime is 135636239. The reversal of 135636228 is 822636531.

It is a happy number.

135636228 is a `hidden beast` number, since 13 + 5 + 636 + 2 + 2 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 135636192 and 135636201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135636223) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 363450 + ... + 363822.

Almost surely, 2^135636228 is an apocalyptic number.

135636228 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 135636228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222844160).

135636228 is an abundant number, since it is smaller than the sum of its proper divisors (310052092).

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

135636228 is a wasteful number, since it uses less digits than its factorization.

135636228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443 (or 435 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 135636228 is about 11646.2967504697. The cubic root of 135636228 is about 513.7973987916.

135636228 divided by its sum of digits (36) gives a palindrome (3767673).

It can be divided in two parts, 13563 and 6228, that added together give a palindrome (19791).

The spelling of 135636228 in words is "one hundred thirty-five million, six hundred thirty-six thousand, two hundred twenty-eight".