198854918 has 16 divisors (see below), whose sum is σ = 312063840. Its totient is φ = 94856256.

The previous prime is 198854917. The next prime is 198854927. The reversal of 198854918 is 819458891.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 198854918.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198854911) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 12818 + ... + 23706.

It is an arithmetic number, because the mean of its divisors is an integer number (19503990).

Almost surely, 2^198854918 is an apocalyptic number.

198854918 is a deficient number, since it is larger than the sum of its proper divisors (113208922).

198854918 is a wasteful number, since it uses less digits than its factorization.

198854918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11311.

The product of its digits is 829440, while the sum is 53.

The square root of 198854918 is about 14101.5927469205. The cubic root of 198854918 is about 583.6853308097.

The spelling of 198854918 in words is "one hundred ninety-eight million, eight hundred fifty-four thousand, nine hundred eighteen".