199985928 has 32 divisors (see below), whose sum is σ = 508442400. Its totient is φ = 65531648.

The previous prime is 199985923. The next prime is 199985941. The reversal of 199985928 is 829589991.

199985928 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (199985921) 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, 69201 + ... + 72032.

It is an arithmetic number, because the mean of its divisors is an integer number (15888825).

Almost surely, 2^199985928 is an apocalyptic number.

It is an amenable number.

199985928 is an abundant number, since it is smaller than the sum of its proper divisors (308456472).

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

199985928 is a wasteful number, since it uses less digits than its factorization.

199985928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141301 (or 141297 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 60.

The square root of 199985928 is about 14141.6380946480. The cubic root of 199985928 is about 584.7898317283.

The spelling of 199985928 in words is "one hundred ninety-nine million, nine hundred eighty-five thousand, nine hundred twenty-eight".