198509434 has 8 divisors (see below), whose sum is σ = 298722528. Its totient is φ = 98935260.

The previous prime is 198509431. The next prime is 198509447. The reversal of 198509434 is 434905891.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (198509431) 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, 158952 + ... + 160195.

It is an arithmetic number, because the mean of its divisors is an integer number (37340316).

Almost surely, 2^198509434 is an apocalyptic number.

198509434 is a deficient number, since it is larger than the sum of its proper divisors (100213094).

198509434 is a wasteful number, since it uses less digits than its factorization.

198509434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319460.

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 198509434 is about 14089.3375997596. The cubic root of 198509434 is about 583.3471096248.

The spelling of 198509434 in words is "one hundred ninety-eight million, five hundred nine thousand, four hundred thirty-four".