199640244 has 12 divisors (see below), whose sum is σ = 465827264. Its totient is φ = 66546744.

The previous prime is 199640237. The next prime is 199640249. The reversal of 199640244 is 442046991.

199640244 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199640249) 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, 8318332 + ... + 8318355.

Almost surely, 2^199640244 is an apocalyptic number.

It is an amenable number.

199640244 is an abundant number, since it is smaller than the sum of its proper divisors (266187020).

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

199640244 is a wasteful number, since it uses less digits than its factorization.

199640244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16636694 (or 16636692 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 199640244 is about 14129.4106034187. The cubic root of 199640244 is about 584.4526928798.

The spelling of 199640244 in words is "one hundred ninety-nine million, six hundred forty thousand, two hundred forty-four".