198542398 has 4 divisors (see below), whose sum is σ = 297813600. Its totient is φ = 99271198.

The previous prime is 198542389. The next prime is 198542423. The reversal of 198542398 is 893245891.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49635598 + ... + 49635601.

It is an arithmetic number, because the mean of its divisors is an integer number (74453400).

Almost surely, 2^198542398 is an apocalyptic number.

198542398 is a deficient number, since it is larger than the sum of its proper divisors (99271202).

198542398 is an equidigital number, since it uses as much as digits as its factorization.

198542398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99271201.

The product of its digits is 622080, while the sum is 49.

The square root of 198542398 is about 14090.5073719863. The cubic root of 198542398 is about 583.3793975778.

The spelling of 198542398 in words is "one hundred ninety-eight million, five hundred forty-two thousand, three hundred ninety-eight".