198839851 has 8 divisors (see below), whose sum is σ = 227432160. Its totient is φ = 170294208.

The previous prime is 198839827. The next prime is 198839867. The reversal of 198839851 is 158938891.

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

It is not a de Polignac number, because 198839851 - 2⁵ = 198839819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198839801) 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, 1996 + ... + 20041.

It is an arithmetic number, because the mean of its divisors is an integer number (28429020).

Almost surely, 2^198839851 is an apocalyptic number.

198839851 is a deficient number, since it is larger than the sum of its proper divisors (28592309).

198839851 is a wasteful number, since it uses less digits than its factorization.

198839851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23333.

The product of its digits is 622080, while the sum is 52.

The square root of 198839851 is about 14101.0585063675. The cubic root of 198839851 is about 583.6705887235.

The spelling of 198839851 in words is "one hundred ninety-eight million, eight hundred thirty-nine thousand, eight hundred fifty-one".