199320198 has 32 divisors (see below), whose sum is σ = 497007360. Its totient is φ = 51771360.

The previous prime is 199320197. The next prime is 199320271. The reversal of 199320198 is 891023991.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199320197) 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 15 ways as a sum of consecutive naturals, for example, 215253 + ... + 216176.

It is an arithmetic number, because the mean of its divisors is an integer number (15531480).

Almost surely, 2^199320198 is an apocalyptic number.

199320198 is an abundant number, since it is smaller than the sum of its proper divisors (297687162).

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

199320198 is a wasteful number, since it uses less digits than its factorization.

199320198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431452.

The product of its (nonzero) digits is 34992, while the sum is 42.

The square root of 199320198 is about 14118.0805352569. The cubic root of 199320198 is about 584.1402111426.

The spelling of 199320198 in words is "one hundred ninety-nine million, three hundred twenty thousand, one hundred ninety-eight".