198193340 has 12 divisors (see below), whose sum is σ = 416206056. Its totient is φ = 79277328.

The previous prime is 198193309. The next prime is 198193343. The reversal of 198193340 is 43391891.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 198193294 and 198193303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198193343) 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 3 ways as a sum of consecutive naturals, for example, 4954814 + ... + 4954853.

It is an arithmetic number, because the mean of its divisors is an integer number (34683838).

Almost surely, 2^198193340 is an apocalyptic number.

198193340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198193340 is an abundant number, since it is smaller than the sum of its proper divisors (218012716).

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

198193340 is a wasteful number, since it uses less digits than its factorization.

198193340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9909676 (or 9909674 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 198193340 is about 14078.1156409514. The cubic root of 198193340 is about 583.0373166577.

The spelling of 198193340 in words is "one hundred ninety-eight million, one hundred ninety-three thousand, three hundred forty".