128825186 has 16 divisors (see below), whose sum is σ = 223326720. Its totient is φ = 54589920.

The previous prime is 128825183. The next prime is 128825227. The reversal of 128825186 is 681528821.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (128825183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50450 + ... + 52941.

It is an arithmetic number, because the mean of its divisors is an integer number (13957920).

Almost surely, 2^128825186 is an apocalyptic number.

128825186 is a deficient number, since it is larger than the sum of its proper divisors (94501534).

128825186 is a wasteful number, since it uses less digits than its factorization.

128825186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103489.

The product of its digits is 61440, while the sum is 41.

The square root of 128825186 is about 11350.1183253744. The cubic root of 128825186 is about 505.0490897612.

The spelling of 128825186 in words is "one hundred twenty-eight million, eight hundred twenty-five thousand, one hundred eighty-six".