198038318 has 4 divisors (see below), whose sum is σ = 297057480. Its totient is φ = 99019158.

The previous prime is 198038299. The next prime is 198038353. The reversal of 198038318 is 813830891.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 813830891 = 647 ⋅1257853.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49509578 + ... + 49509581.

It is an arithmetic number, because the mean of its divisors is an integer number (74264370).

Almost surely, 2^198038318 is an apocalyptic number.

198038318 is a deficient number, since it is larger than the sum of its proper divisors (99019162).

198038318 is an equidigital number, since it uses as much as digits as its factorization.

198038318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99019161.

The product of its (nonzero) digits is 41472, while the sum is 41.

The square root of 198038318 is about 14072.6087844436. The cubic root of 198038318 is about 582.8852644807.

The spelling of 198038318 in words is "one hundred ninety-eight million, thirty-eight thousand, three hundred eighteen".