191838128 has 10 divisors (see below), whose sum is σ = 371686404. Its totient is φ = 95919056.

The previous prime is 191838113. The next prime is 191838131. The reversal of 191838128 is 821838191.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5994926 + ... + 5994957.

Almost surely, 2^191838128 is an apocalyptic number.

It is an amenable number.

191838128 is a deficient number, since it is larger than the sum of its proper divisors (179848276).

191838128 is a wasteful number, since it uses less digits than its factorization.

191838128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11989891 (or 11989885 counting only the distinct ones).

The product of its digits is 27648, while the sum is 41.

The square root of 191838128 is about 13850.5641762348. The cubic root of 191838128 is about 576.7376576633.

The spelling of 191838128 in words is "one hundred ninety-one million, eight hundred thirty-eight thousand, one hundred twenty-eight".