198505216 has 72 divisors (see below), whose sum is σ = 487731104. Its totient is φ = 78520320.

The previous prime is 198505211. The next prime is 198505247. The reversal of 198505216 is 612505891.

It is not an unprimeable number, because it can be changed into a prime (198505211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19036 + ... + 27556.

Almost surely, 2^198505216 is an apocalyptic number.

198505216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 198505216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (243865552).

198505216 is an abundant number, since it is smaller than the sum of its proper divisors (289225888).

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

198505216 is an equidigital number, since it uses as much as digits as its factorization.

198505216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8557 (or 8543 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 37.

The square root of 198505216 is about 14089.1879113028. The cubic root of 198505216 is about 583.3429778723.

The spelling of 198505216 in words is "one hundred ninety-eight million, five hundred five thousand, two hundred sixteen".