198909834 has 32 divisors (see below), whose sum is σ = 405888000. Its totient is φ = 64971504.

The previous prime is 198909833. The next prime is 198909839. The reversal of 198909834 is 438909891.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (198909833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64377 + ... + 67395.

It is an arithmetic number, because the mean of its divisors is an integer number (12684000).

Almost surely, 2^198909834 is an apocalyptic number.

198909834 is an abundant number, since it is smaller than the sum of its proper divisors (206978166).

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

198909834 is a wasteful number, since it uses less digits than its factorization.

198909834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3242.

The product of its (nonzero) digits is 559872, while the sum is 51.

The square root of 198909834 is about 14103.5397684411. The cubic root of 198909834 is about 583.7390562657.

The spelling of 198909834 in words is "one hundred ninety-eight million, nine hundred nine thousand, eight hundred thirty-four".