199928 has 16 divisors (see below), whose sum is σ = 381480. Its totient is φ = 98208.

The previous prime is 199921. The next prime is 199931. The reversal of 199928 is 829991.

199928 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 199891 and 199900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 350 + ... + 722.

2¹⁹⁹⁹²⁸ is an apocalyptic number.

It is an amenable number.

199928 is a deficient number, since it is larger than the sum of its proper divisors (181552).

199928 is a wasteful number, since it uses less digits than its factorization.

199928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446 (or 442 counting only the distinct ones).

The product of its digits is 11664, while the sum is 38.

The square root of 199928 is about 447.1330898066. The cubic root of 199928 is about 58.4733362794.

The spelling of 199928 in words is "one hundred ninety-nine thousand, nine hundred twenty-eight".