135280188 has 36 divisors (see below), whose sum is σ = 347569768. Its totient is φ = 44353440.

The previous prime is 135280183. The next prime is 135280199. The reversal of 135280188 is 881082531.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135280183) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28606 + ... + 32997.

Almost surely, 2^135280188 is an apocalyptic number.

135280188 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

135280188 is an abundant number, since it is smaller than the sum of its proper divisors (212289580).

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

135280188 is a wasteful number, since it uses less digits than its factorization.

135280188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61674 (or 61669 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 36.

The square root of 135280188 is about 11631.0011606912. The cubic root of 135280188 is about 513.3474385660.

The spelling of 135280188 in words is "one hundred thirty-five million, two hundred eighty thousand, one hundred eighty-eight".