198430918 has 8 divisors (see below), whose sum is σ = 340167312. Its totient is φ = 85041816.

The previous prime is 198430901. The next prime is 198430943. The reversal of 198430918 is 819034891.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7086805 + ... + 7086832.

It is an arithmetic number, because the mean of its divisors is an integer number (42520914).

Almost surely, 2^198430918 is an apocalyptic number.

198430918 is a deficient number, since it is larger than the sum of its proper divisors (141736394).

198430918 is a wasteful number, since it uses less digits than its factorization.

198430918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14173646.

The product of its (nonzero) digits is 62208, while the sum is 43.

The square root of 198430918 is about 14086.5509618217. The cubic root of 198430918 is about 583.2701894826.

The spelling of 198430918 in words is "one hundred ninety-eight million, four hundred thirty thousand, nine hundred eighteen".