198851345 has 32 divisors (see below), whose sum is σ = 298480896. Its totient is φ = 123552000.

The previous prime is 198851339. The next prime is 198851369. The reversal of 198851345 is 543158891.

It is not a de Polignac number, because 198851345 - 2⁶ = 198851281 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 198851296 and 198851305.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 152195 + ... + 153495.

It is an arithmetic number, because the mean of its divisors is an integer number (9327528).

Almost surely, 2^198851345 is an apocalyptic number.

It is an amenable number.

198851345 is a deficient number, since it is larger than the sum of its proper divisors (99629551).

198851345 is a wasteful number, since it uses less digits than its factorization.

198851345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1721.

The product of its digits is 172800, while the sum is 44.

The square root of 198851345 is about 14101.4660585345. The cubic root of 198851345 is about 583.6818349274.

The spelling of 198851345 in words is "one hundred ninety-eight million, eight hundred fifty-one thousand, three hundred forty-five".