199280900 has 144 divisors (see below), whose sum is σ = 542465280. Its totient is φ = 61862400.

The previous prime is 199280881. The next prime is 199280903. The reversal of 199280900 is 9082991.

It is not an unprimeable number, because it can be changed into a prime (199280903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 554921 + ... + 555279.

It is an arithmetic number, because the mean of its divisors is an integer number (3767120).

Almost surely, 2^199280900 is an apocalyptic number.

199280900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 199280900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (271232640).

199280900 is an abundant number, since it is smaller than the sum of its proper divisors (343184380).

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

199280900 is a wasteful number, since it uses less digits than its factorization.

199280900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454 (or 447 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 38.

The square root of 199280900 is about 14116.6887052170. The cubic root of 199280900 is about 584.1018188956.

The spelling of 199280900 in words is "one hundred ninety-nine million, two hundred eighty thousand, nine hundred".