198227618 has 8 divisors (see below), whose sum is σ = 300069660. Its totient is φ = 98204400.

The previous prime is 198227597. The next prime is 198227657. The reversal of 198227618 is 816722891.

198227618 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 165199609 + 33028009 = 12853^2 + 5747^2 .

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

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, 454433 + ... + 454868.

Almost surely, 2^198227618 is an apocalyptic number.

198227618 is a deficient number, since it is larger than the sum of its proper divisors (101842042).

198227618 is a wasteful number, since it uses less digits than its factorization.

198227618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909412.

The product of its digits is 96768, while the sum is 44.

The square root of 198227618 is about 14079.3330097700. Note that the first 3 decimals coincide. The cubic root of 198227618 is about 583.0709272743.

The spelling of 198227618 in words is "one hundred ninety-eight million, two hundred twenty-seven thousand, six hundred eighteen".