198518144 has 64 divisors (see below), whose sum is σ = 433846800. Its totient is φ = 89733120.

The previous prime is 198518123. The next prime is 198518153. The reversal of 198518144 is 441815891.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 389762 + ... + 390270.

Almost surely, 2^198518144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 198518144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (216923400).

198518144 is an abundant number, since it is smaller than the sum of its proper divisors (235328656).

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

198518144 is a wasteful number, since it uses less digits than its factorization.

198518144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811 (or 799 counting only the distinct ones).

The product of its digits is 46080, while the sum is 41.

The square root of 198518144 is about 14089.6466953576. The cubic root of 198518144 is about 583.3556413419.

The spelling of 198518144 in words is "one hundred ninety-eight million, five hundred eighteen thousand, one hundred forty-four".