199790885 has 24 divisors (see below), whose sum is σ = 295303320. Its totient is φ = 128937984.

The previous prime is 199790881. The next prime is 199790911. The reversal of 199790885 is 588097991.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 65254084 + 134536801 = 8078^2 + 11599^2 .

It is not a de Polignac number, because 199790885 - 2² = 199790881 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 199790885.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199790881) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 19820 + ... + 28149.

It is an arithmetic number, because the mean of its divisors is an integer number (12304305).

Almost surely, 2^199790885 is an apocalyptic number.

It is an amenable number.

199790885 is a deficient number, since it is larger than the sum of its proper divisors (95512435).

199790885 is a wasteful number, since it uses less digits than its factorization.

199790885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48005 (or 47998 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 56.

The square root of 199790885 is about 14134.7403584219. The cubic root of 199790885 is about 584.5996579089.

The spelling of 199790885 in words is "one hundred ninety-nine million, seven hundred ninety thousand, eight hundred eighty-five".