199808900 has 18 divisors (see below), whose sum is σ = 433585530. Its totient is φ = 79923520.

The previous prime is 199808893. The next prime is 199808951. The reversal of 199808900 is 9808991.

It can be written as a sum of positive squares in 3 ways, for example, as 55472704 + 144336196 = 7448^2 + 12014^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 998945 + ... + 999144.

It is an arithmetic number, because the mean of its divisors is an integer number (24088085).

Almost surely, 2^199808900 is an apocalyptic number.

199808900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199808900 is an abundant number, since it is smaller than the sum of its proper divisors (233776630).

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

199808900 is a wasteful number, since it uses less digits than its factorization.

199808900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1998103 (or 1998096 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 44.

The square root of 199808900 is about 14135.3776037289. The cubic root of 199808900 is about 584.6172283574.

The spelling of 199808900 in words is "one hundred ninety-nine million, eight hundred eight thousand, nine hundred".