198486685 has 8 divisors (see below), whose sum is σ = 244621656. Its totient is φ = 154497600.

The previous prime is 198486637. The next prime is 198486689. The reversal of 198486685 is 586684891.

It can be written as a sum of positive squares in 4 ways, for example, as 16695396 + 181791289 = 4086^2 + 13483^2 .

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

It is not a de Polignac number, because 198486685 - 2⁹ = 198486173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198486689) 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, 536266 + ... + 536635.

It is an arithmetic number, because the mean of its divisors is an integer number (30577707).

Almost surely, 2^198486685 is an apocalyptic number.

It is an amenable number.

198486685 is a deficient number, since it is larger than the sum of its proper divisors (46134971).

198486685 is a wasteful number, since it uses less digits than its factorization.

198486685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1072943.

The product of its digits is 3317760, while the sum is 55.

The square root of 198486685 is about 14088.5302640126. The cubic root of 198486685 is about 583.3248250913.

The spelling of 198486685 in words is "one hundred ninety-eight million, four hundred eighty-six thousand, six hundred eighty-five".