686000198 has 16 divisors (see below), whose sum is σ = 1126938960. Its totient is φ = 311248416.

The previous prime is 686000197. The next prime is 686000221. The reversal of 686000198 is 891000686.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686000197) 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, 222065 + ... + 225132.

It is an arithmetic number, because the mean of its divisors is an integer number (70433685).

Almost surely, 2^686000198 is an apocalyptic number.

686000198 is a deficient number, since it is larger than the sum of its proper divisors (440938762).

686000198 is a wasteful number, since it uses less digits than its factorization.

686000198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447271.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 686000198 is about 26191.6054872549. The cubic root of 686000198 is about 881.9448197782.

The spelling of 686000198 in words is "six hundred eighty-six million, one hundred ninety-eight", and thus it is an aban number.