199986944 has 18 divisors (see below), whose sum is σ = 399193200. Its totient is φ = 99993344.

The previous prime is 199986911. The next prime is 199986953. The reversal of 199986944 is 449689991.

199986944 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 390344 + ... + 390855.

It is an arithmetic number, because the mean of its divisors is an integer number (22177400).

Almost surely, 2^199986944 is an apocalyptic number.

It is an amenable number.

199986944 is a deficient number, since it is larger than the sum of its proper divisors (199206256).

199986944 is an frugal number, since it uses more digits than its factorization.

199986944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781215 (or 781201 counting only the distinct ones).

The product of its digits is 5038848, while the sum is 59.

The square root of 199986944 is about 14141.6740168906. The cubic root of 199986944 is about 584.7908220405.

The spelling of 199986944 in words is "one hundred ninety-nine million, nine hundred eighty-six thousand, nine hundred forty-four".