198049818 has 8 divisors (see below), whose sum is σ = 396099648. Its totient is φ = 66016604.

The previous prime is 198049807. The next prime is 198049823. The reversal of 198049818 is 818940891.

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

198049818 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 16504146 + ... + 16504157.

It is an arithmetic number, because the mean of its divisors is an integer number (49512456).

Almost surely, 2^198049818 is an apocalyptic number.

198049818 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

198049818 is a wasteful number, since it uses less digits than its factorization.

198049818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33008308.

The product of its (nonzero) digits is 165888, while the sum is 48.

The square root of 198049818 is about 14073.0173736836. The cubic root of 198049818 is about 582.8965468946.

The spelling of 198049818 in words is "one hundred ninety-eight million, forty-nine thousand, eight hundred eighteen".