198248809 has 8 divisors (see below), whose sum is σ = 216928800. Its totient is φ = 179678400.

The previous prime is 198248807. The next prime is 198248819. The reversal of 198248809 is 908842891.

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

It is not a de Polignac number, because 198248809 - 2¹ = 198248807 is a prime.

It is not an unprimeable number, because it can be changed into a prime (198248807) 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 7 ways as a sum of consecutive naturals, for example, 23584 + ... + 30865.

It is an arithmetic number, because the mean of its divisors is an integer number (27116100).

Almost surely, 2^198248809 is an apocalyptic number.

It is an amenable number.

198248809 is a deficient number, since it is larger than the sum of its proper divisors (18679991).

198248809 is a wasteful number, since it uses less digits than its factorization.

198248809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54791.

The product of its (nonzero) digits is 331776, while the sum is 49.

The square root of 198248809 is about 14080.0855466151. The cubic root of 198248809 is about 583.0917037532.

The spelling of 198248809 in words is "one hundred ninety-eight million, two hundred forty-eight thousand, eight hundred nine".