198691338 has 16 divisors (see below), whose sum is σ = 410201856. Its totient is φ = 64093920.

The previous prime is 198691333. The next prime is 198691391. The reversal of 198691338 is 833196891.

It is not an unprimeable number, because it can be changed into a prime (198691331) 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, 533931 + ... + 534302.

It is an arithmetic number, because the mean of its divisors is an integer number (25637616).

Almost surely, 2^198691338 is an apocalyptic number.

198691338 is an abundant number, since it is smaller than the sum of its proper divisors (211510518).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

198691338 is a wasteful number, since it uses less digits than its factorization.

198691338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1068269.

The product of its digits is 279936, while the sum is 48.

The square root of 198691338 is about 14095.7914995931. The cubic root of 198691338 is about 583.5252384837.

The spelling of 198691338 in words is "one hundred ninety-eight million, six hundred ninety-one thousand, three hundred thirty-eight".