198591338 has 16 divisors (see below), whose sum is σ = 339097536. Its totient is φ = 86343840.

The previous prime is 198591311. The next prime is 198591347. The reversal of 198591338 is 833195891.

It is a junction number, because it is equal to n+sod(n) for n = 198591292 and 198591301.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195731 + ... + 196742.

It is an arithmetic number, because the mean of its divisors is an integer number (21193596).

Almost surely, 2^198591338 is an apocalyptic number.

198591338 is a deficient number, since it is larger than the sum of its proper divisors (140506198).

198591338 is a wasteful number, since it uses less digits than its factorization.

198591338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392509.

The product of its digits is 233280, while the sum is 47.

The square root of 198591338 is about 14092.2438951361. The cubic root of 198591338 is about 583.4273272936.

The spelling of 198591338 in words is "one hundred ninety-eight million, five hundred ninety-one thousand, three hundred thirty-eight".