128131194 has 8 divisors (see below), whose sum is σ = 256262400. Its totient is φ = 42710396.

The previous prime is 128131187. The next prime is 128131207. The reversal of 128131194 is 491131821.

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

128131194 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10677594 + ... + 10677605.

It is an arithmetic number, because the mean of its divisors is an integer number (32032800).

Almost surely, 2^128131194 is an apocalyptic number.

128131194 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

128131194 is a wasteful number, since it uses less digits than its factorization.

128131194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21355204.

The product of its digits is 1728, while the sum is 30.

The square root of 128131194 is about 11319.5050245141. The cubic root of 128131194 is about 504.1405425011.

The spelling of 128131194 in words is "one hundred twenty-eight million, one hundred thirty-one thousand, one hundred ninety-four".