198856135 has 8 divisors (see below), whose sum is σ = 238720176. Its totient is φ = 159023040.

The previous prime is 198856121. The next prime is 198856139. The reversal of 198856135 is 531658891.

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

It is not a de Polignac number, because 198856135 - 2⁹ = 198855623 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 (198856139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10180 + ... + 22390.

It is an arithmetic number, because the mean of its divisors is an integer number (29840022).

Almost surely, 2^198856135 is an apocalyptic number.

198856135 is a deficient number, since it is larger than the sum of its proper divisors (39864041).

198856135 is a wasteful number, since it uses less digits than its factorization.

198856135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15473.

The product of its digits is 259200, while the sum is 46.

The square root of 198856135 is about 14101.6358980084. The cubic root of 198856135 is about 583.6865215331.

The spelling of 198856135 in words is "one hundred ninety-eight million, eight hundred fifty-six thousand, one hundred thirty-five".