198354018 has 8 divisors (see below), whose sum is σ = 396708048. Its totient is φ = 66118004.

The previous prime is 198353989. The next prime is 198354031. The reversal of 198354018 is 810453891.

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

198354018 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16529496 + ... + 16529507.

It is an arithmetic number, because the mean of its divisors is an integer number (49588506).

Almost surely, 2^198354018 is an apocalyptic number.

198354018 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.

198354018 is a wasteful number, since it uses less digits than its factorization.

198354018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33059008.

The product of its (nonzero) digits is 34560, while the sum is 39.

The square root of 198354018 is about 14083.8211434255. The cubic root of 198354018 is about 583.1948328237.

The spelling of 198354018 in words is "one hundred ninety-eight million, three hundred fifty-four thousand, eighteen".