198444685 has 8 divisors (see below), whose sum is σ = 238704480. Its totient is φ = 158375184.

The previous prime is 198444647. The next prime is 198444691. The reversal of 198444685 is 586444891.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 198444685 - 2⁷ = 198444557 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 45267 + ... + 49456.

It is an arithmetic number, because the mean of its divisors is an integer number (29838060).

Almost surely, 2^198444685 is an apocalyptic number.

It is an amenable number.

198444685 is a deficient number, since it is larger than the sum of its proper divisors (40259795).

198444685 is an equidigital number, since it uses as much as digits as its factorization.

198444685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95147.

The product of its digits is 1105920, while the sum is 49.

The square root of 198444685 is about 14087.0396109332. The cubic root of 198444685 is about 583.2836781316.

The spelling of 198444685 in words is "one hundred ninety-eight million, four hundred forty-four thousand, six hundred eighty-five".