199856 has 10 divisors (see below), whose sum is σ = 387252. Its totient is φ = 99920.

The previous prime is 199853. The next prime is 199873. The reversal of 199856 is 658991.

It is not an unprimeable number, because it can be changed into a prime (199853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6230 + ... + 6261.

2¹⁹⁹⁸⁵⁶ is an apocalyptic number.

199856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

199856 is a deficient number, since it is larger than the sum of its proper divisors (187396).

199856 is a wasteful number, since it uses less digits than its factorization.

199856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12499 (or 12493 counting only the distinct ones).

The product of its digits is 19440, while the sum is 38.

The square root of 199856 is about 447.0525696157. The cubic root of 199856 is about 58.4663161093.

It can be divided in two parts, 19985 and 6, that added together give a palindrome (19991).

The spelling of 199856 in words is "one hundred ninety-nine thousand, eight hundred fifty-six".