199490290 has 8 divisors (see below), whose sum is σ = 359082540. Its totient is φ = 79796112.

The previous prime is 199490267. The next prime is 199490341. The reversal of 199490290 is 92094991.

It can be written as a sum of positive squares in 2 ways, for example, as 199063881 + 426409 = 14109^2 + 653^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9974505 + ... + 9974524.

Almost surely, 2^199490290 is an apocalyptic number.

199490290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

199490290 is a deficient number, since it is larger than the sum of its proper divisors (159592250).

199490290 is a wasteful number, since it uses less digits than its factorization.

199490290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19949036.

The product of its (nonzero) digits is 52488, while the sum is 43.

The square root of 199490290 is about 14124.1031573690. The cubic root of 199490290 is about 584.3063246434.

The spelling of 199490290 in words is "one hundred ninety-nine million, four hundred ninety thousand, two hundred ninety".