199831128 has 32 divisors (see below), whose sum is σ = 570946560. Its totient is φ = 57094560.

The previous prime is 199831123. The next prime is 199831129. The reversal of 199831128 is 821138991.

199831128 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 199831128.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199831123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 594568 + ... + 594903.

It is an arithmetic number, because the mean of its divisors is an integer number (17842080).

Almost surely, 2^199831128 is an apocalyptic number.

It is an amenable number.

199831128 is an abundant number, since it is smaller than the sum of its proper divisors (371115432).

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

199831128 is a wasteful number, since it uses less digits than its factorization.

199831128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1189487 (or 1189483 counting only the distinct ones).

The product of its digits is 31104, while the sum is 42.

The square root of 199831128 is about 14136.1638360625. The cubic root of 199831128 is about 584.6389063872.

The spelling of 199831128 in words is "one hundred ninety-nine million, eight hundred thirty-one thousand, one hundred twenty-eight".