128186229 has 8 divisors (see below), whose sum is σ = 171051552. Its totient is φ = 85389200.

The previous prime is 128186221. The next prime is 128186231. The reversal of 128186229 is 922681821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128186229 - 2³ = 128186221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128186221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12519 + ... + 20324.

It is an arithmetic number, because the mean of its divisors is an integer number (21381444).

Almost surely, 2^128186229 is an apocalyptic number.

It is an amenable number.

128186229 is a deficient number, since it is larger than the sum of its proper divisors (42865323).

128186229 is a wasteful number, since it uses less digits than its factorization.

128186229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34147.

The product of its digits is 27648, while the sum is 39.

The square root of 128186229 is about 11321.9357443858. The cubic root of 128186229 is about 504.2127117688.

The spelling of 128186229 in words is "one hundred twenty-eight million, one hundred eighty-six thousand, two hundred twenty-nine".