198447872 has 144 divisors (see below), whose sum is σ = 482809152. Its totient is φ = 79626240.

The previous prime is 198447863. The next prime is 198447877. The reversal of 198447872 is 278744891.

It is a super-3 number, since 3×198447872³ (a number of 26 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 198447872.

It is not an unprimeable number, because it can be changed into a prime (198447877) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2718428 + ... + 2718500.

Almost surely, 2^198447872 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 198447872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241404576).

198447872 is an abundant number, since it is smaller than the sum of its proper divisors (284361280).

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

198447872 is an equidigital number, since it uses as much as digits as its factorization.

198447872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174 (or 160 counting only the distinct ones).

The product of its digits is 903168, while the sum is 50.

The square root of 198447872 is about 14087.1527286390. The cubic root of 198447872 is about 583.2868006056.

The spelling of 198447872 in words is "one hundred ninety-eight million, four hundred forty-seven thousand, eight hundred seventy-two".