199998650 has 24 divisors (see below), whose sum is σ = 375420540. Its totient is φ = 79263360.

The previous prime is 199998649. The next prime is 199998661. The reversal of 199998650 is 56899991.

It can be written as a sum of positive squares in 6 ways, for example, as 62710561 + 137288089 = 7919^2 + 11717^2 .

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 11 ways as a sum of consecutive naturals, for example, 12899 + ... + 23798.

Almost surely, 2^199998650 is an apocalyptic number.

199998650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

199998650 is a deficient number, since it is larger than the sum of its proper divisors (175421890).

199998650 is a wasteful number, since it uses less digits than its factorization.

199998650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36818 (or 36813 counting only the distinct ones).

The product of its (nonzero) digits is 1574640, while the sum is 56.

The square root of 199998650 is about 14142.0878939427. The cubic root of 199998650 is about 584.8022318316.

The spelling of 199998650 in words is "one hundred ninety-nine million, nine hundred ninety-eight thousand, six hundred fifty".