198216726 has 8 divisors (see below), whose sum is σ = 396433464. Its totient is φ = 66072240.

The previous prime is 198216703. The next prime is 198216727. The reversal of 198216726 is 627612891.

198216726 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

198216726 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198216727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16518055 + ... + 16518066.

It is an arithmetic number, because the mean of its divisors is an integer number (49554183).

Almost surely, 2^198216726 is an apocalyptic number.

198216726 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

198216726 is a wasteful number, since it uses less digits than its factorization.

198216726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33036126.

The product of its digits is 72576, while the sum is 42.

The square root of 198216726 is about 14078.9461963600. The cubic root of 198216726 is about 583.0602477586.

The spelling of 198216726 in words is "one hundred ninety-eight million, two hundred sixteen thousand, seven hundred twenty-six".