198735838 has 8 divisors (see below), whose sum is σ = 340690032. Its totient is φ = 85172496.

The previous prime is 198735833. The next prime is 198735853. The reversal of 198735838 is 838537891.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198735833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7097695 + ... + 7097722.

It is an arithmetic number, because the mean of its divisors is an integer number (42586254).

Almost surely, 2^198735838 is an apocalyptic number.

198735838 is a deficient number, since it is larger than the sum of its proper divisors (141954194).

198735838 is a wasteful number, since it uses less digits than its factorization.

198735838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14195426.

The product of its digits is 1451520, while the sum is 52.

The square root of 198735838 is about 14097.3698965445. The cubic root of 198735838 is about 583.5687984010.

The spelling of 198735838 in words is "one hundred ninety-eight million, seven hundred thirty-five thousand, eight hundred thirty-eight".