131128188 has 12 divisors (see below), whose sum is σ = 305965800. Its totient is φ = 43709392.

The previous prime is 131128187. The next prime is 131128211. The reversal of 131128188 is 881821131.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131128181) 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 3 ways as a sum of consecutive naturals, for example, 5463663 + ... + 5463686.

It is an arithmetic number, because the mean of its divisors is an integer number (25497150).

Almost surely, 2^131128188 is an apocalyptic number.

It is an amenable number.

131128188 is an abundant number, since it is smaller than the sum of its proper divisors (174837612).

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

131128188 is a wasteful number, since it uses less digits than its factorization.

131128188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10927356 (or 10927354 counting only the distinct ones).

The product of its digits is 3072, while the sum is 33.

The square root of 131128188 is about 11451.1216917820. The cubic root of 131128188 is about 508.0409116203.

The spelling of 131128188 in words is "one hundred thirty-one million, one hundred twenty-eight thousand, one hundred eighty-eight".