199890244 has 12 divisors (see below), whose sum is σ = 349933500. Its totient is φ = 99909248.

The previous prime is 199890239. The next prime is 199890277. The reversal of 199890244 is 442098991.

It can be written as a sum of positive squares in 2 ways, for example, as 10497600 + 189392644 = 3240^2 + 13762^2 .

It is a super-2 number, since 2×199890244² = 79912219292759072, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 199890194 and 199890203.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6552 + ... + 21040.

It is an arithmetic number, because the mean of its divisors is an integer number (29161125).

Almost surely, 2^199890244 is an apocalyptic number.

It is an amenable number.

199890244 is a deficient number, since it is larger than the sum of its proper divisors (150043256).

199890244 is a wasteful number, since it uses less digits than its factorization.

199890244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17942 (or 17940 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 46.

The square root of 199890244 is about 14138.2546306112. The cubic root of 199890244 is about 584.6965519042.

The spelling of 199890244 in words is "one hundred ninety-nine million, eight hundred ninety thousand, two hundred forty-four".