198040641 has 8 divisors (see below), whose sum is σ = 264424320. Its totient is φ = 131842032.

The previous prime is 198040637. The next prime is 198040643. The reversal of 198040641 is 146040891.

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

It is not a de Polignac number, because 198040641 - 2² = 198040637 is a prime.

It is not an unprimeable number, because it can be changed into a prime (198040643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43750 + ... + 48063.

It is an arithmetic number, because the mean of its divisors is an integer number (33053040).

Almost surely, 2^198040641 is an apocalyptic number.

It is an amenable number.

198040641 is a deficient number, since it is larger than the sum of its proper divisors (66383679).

198040641 is an equidigital number, since it uses as much as digits as its factorization.

198040641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92535.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 198040641 is about 14072.6913204262. The cubic root of 198040641 is about 582.8875435635.

The spelling of 198040641 in words is "one hundred ninety-eight million, forty thousand, six hundred forty-one".