2128942188 has 36 divisors (see below), whose sum is σ = 5420786280. Its totient is φ = 704465856.

The previous prime is 2128942183. The next prime is 2128942217. The reversal of 2128942188 is 8812498212.

2128942188 is a `hidden beast` number, since 212 + 8 + 9 + 421 + 8 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (2128942183) 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 11 ways as a sum of consecutive naturals, for example, 210898 + ... + 220761.

Almost surely, 2^2128942188 is an apocalyptic number.

It is an amenable number.

2128942188 is an abundant number, since it is smaller than the sum of its proper divisors (3291844092).

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

2128942188 is a wasteful number, since it uses less digits than its factorization.

2128942188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431806 (or 431801 counting only the distinct ones).

The product of its digits is 147456, while the sum is 45.

The square root of 2128942188 is about 46140.4615061445. The cubic root of 2128942188 is about 1286.4353218911.

The spelling of 2128942188 in words is "two billion, one hundred twenty-eight million, nine hundred forty-two thousand, one hundred eighty-eight".