191130128 has 40 divisors (see below), whose sum is σ = 436876800. Its totient is φ = 79269120.

The previous prime is 191130127. The next prime is 191130131. The reversal of 191130128 is 821031191.

It is a junction number, because it is equal to n+sod(n) for n = 191130097 and 191130106.

It is not an unprimeable number, because it can be changed into a prime (191130127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24053 + ... + 30996.

It is an arithmetic number, because the mean of its divisors is an integer number (10921920).

Almost surely, 2^191130128 is an apocalyptic number.

It is an amenable number.

191130128 is an abundant number, since it is smaller than the sum of its proper divisors (245746672).

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

191130128 is a wasteful number, since it uses less digits than its factorization.

191130128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55095 (or 55089 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 26.

The square root of 191130128 is about 13824.9820253048. The cubic root of 191130128 is about 576.0272781577.

The spelling of 191130128 in words is "one hundred ninety-one million, one hundred thirty thousand, one hundred twenty-eight".