199985076 has 36 divisors (see below), whose sum is σ = 535255812. Its totient is φ = 62740224.

The previous prime is 199985053. The next prime is 199985077. The reversal of 199985076 is 670589991.

It can be written as a sum of positive squares in 2 ways, for example, as 123876900 + 76108176 = 11130^2 + 8724^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199985077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 162775 + ... + 163998.

It is an arithmetic number, because the mean of its divisors is an integer number (14868217).

Almost surely, 2^199985076 is an apocalyptic number.

It is an amenable number.

199985076 is an abundant number, since it is smaller than the sum of its proper divisors (335270736).

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

199985076 is a wasteful number, since it uses less digits than its factorization.

199985076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326800 (or 326795 counting only the distinct ones).

The product of its (nonzero) digits is 1224720, while the sum is 54.

The square root of 199985076 is about 14141.6079708073. The cubic root of 199985076 is about 584.7890012672.

The spelling of 199985076 in words is "one hundred ninety-nine million, nine hundred eighty-five thousand, seventy-six".