198309838 has 8 divisors (see below), whose sum is σ = 297624600. Its totient is φ = 99101640.

The previous prime is 198309823. The next prime is 198309847. The reversal of 198309838 is 838903891.

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

It is a junction number, because it is equal to n+sod(n) for n = 198309791 and 198309800.

It is a congruent number.

It is an unprimeable number.

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, 21813 + ... + 29536.

It is an arithmetic number, because the mean of its divisors is an integer number (37203075).

Almost surely, 2^198309838 is an apocalyptic number.

198309838 is a deficient number, since it is larger than the sum of its proper divisors (99314762).

198309838 is a wasteful number, since it uses less digits than its factorization.

198309838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53282.

The product of its (nonzero) digits is 373248, while the sum is 49.

The square root of 198309838 is about 14082.2525896960. The cubic root of 198309838 is about 583.1515306828.

The spelling of 198309838 in words is "one hundred ninety-eight million, three hundred nine thousand, eight hundred thirty-eight".