135166428 has 48 divisors (see below), whose sum is σ = 352265760. Its totient is φ = 44819712.

The previous prime is 135166411. The next prime is 135166459. The reversal of 135166428 is 824661531.

It is a happy number.

135166428 is a `hidden beast` number, since 1 + 3 + 5 + 1 + 6 + 642 + 8 = 666.

135166428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 = 135166392 and 135166401.

It is a congruent number.

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, 18100 + ... + 24452.

It is an arithmetic number, because the mean of its divisors is an integer number (7338870).

Almost surely, 2^135166428 is an apocalyptic number.

135166428 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 135166428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176132880).

135166428 is an abundant number, since it is smaller than the sum of its proper divisors (217099332).

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

135166428 is a wasteful number, since it uses less digits than its factorization.

135166428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6563 (or 6555 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 135166428 is about 11626.1097534816. The cubic root of 135166428 is about 513.2035032699.

The spelling of 135166428 in words is "one hundred thirty-five million, one hundred sixty-six thousand, four hundred twenty-eight".