198156144 has 20 divisors (see below), whose sum is σ = 511903496. Its totient is φ = 66052032.

The previous prime is 198156139. The next prime is 198156151. The reversal of 198156144 is 441651891.

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, 2064079 + ... + 2064174.

Almost surely, 2^198156144 is an apocalyptic number.

It is an amenable number.

198156144 is an abundant number, since it is smaller than the sum of its proper divisors (313747352).

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

198156144 is a wasteful number, since it uses less digits than its factorization.

198156144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4128264 (or 4128258 counting only the distinct ones).

The product of its digits is 34560, while the sum is 39.

The square root of 198156144 is about 14076.7945214811. The cubic root of 198156144 is about 583.0008404693. Note that the first 3 decimals are identical.

The spelling of 198156144 in words is "one hundred ninety-eight million, one hundred fifty-six thousand, one hundred forty-four".