199388290 has 16 divisors (see below), whose sum is σ = 359230968. Its totient is φ = 79681536.

The previous prime is 199388251. The next prime is 199388297. The reversal of 199388290 is 92883991.

It can be written as a sum of positive squares in 4 ways, for example, as 135978921 + 63409369 = 11661^2 + 7963^2 .

It is not an unprimeable number, because it can be changed into a prime (199388297) 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 7 ways as a sum of consecutive naturals, for example, 2884 + ... + 20176.

Almost surely, 2^199388290 is an apocalyptic number.

199388290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

199388290 is a deficient number, since it is larger than the sum of its proper divisors (159842678).

199388290 is a wasteful number, since it uses less digits than its factorization.

199388290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18453.

The product of its (nonzero) digits is 279936, while the sum is 49.

The square root of 199388290 is about 14120.4918469577. The cubic root of 199388290 is about 584.2067217909.

The spelling of 199388290 in words is "one hundred ninety-nine million, three hundred eighty-eight thousand, two hundred ninety".