9000000198 has 48 divisors (see below), whose sum is σ = 22408897056. Its totient is φ = 2557215360.

The previous prime is 9000000193. The next prime is 9000000221. The reversal of 9000000198 is 8910000009.

9000000198 is a modest number, since divided by 198 gives 90 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9000000193) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 174511 + ... + 220122.

It is an arithmetic number, because the mean of its divisors is an integer number (466852022).

Almost surely, 2^9000000198 is an apocalyptic number.

9000000198 is an abundant number, since it is smaller than the sum of its proper divisors (13408896858).

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

9000000198 is a wasteful number, since it uses less digits than its factorization.

9000000198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394829 (or 394826 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The square root of 9000000198 is about 94868.3308486030. The cubic root of 9000000198 is about 2080.0838383059.

The spelling of 9000000198 in words is "nine billion, one hundred ninety-eight", and thus it is an aban number.