199281900 has 36 divisors (see below), whose sum is σ = 576589832. Its totient is φ = 53141760.

The previous prime is 199281883. The next prime is 199281931. The reversal of 199281900 is 9182991.

It is a happy number.

It is a super-2 number, since 2×199281900² = 79426551335220000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 331837 + ... + 332436.

Almost surely, 2^199281900 is an apocalyptic number.

199281900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199281900 is an abundant number, since it is smaller than the sum of its proper divisors (377307932).

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

199281900 is a wasteful number, since it uses less digits than its factorization.

199281900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664290 (or 664283 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 39.

The square root of 199281900 is about 14116.7241242436. The cubic root of 199281900 is about 584.1027959099.

The spelling of 199281900 in words is "one hundred ninety-nine million, two hundred eighty-one thousand, nine hundred".