198431008 has 24 divisors (see below), whose sum is σ = 392656572. Its totient is φ = 98708736.

The previous prime is 198430961. The next prime is 198431011. The reversal of 198431008 is 800134891.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 167650704 + 30780304 = 12948^2 + 5548^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9435 + ... + 22042.

Almost surely, 2^198431008 is an apocalyptic number.

It is an amenable number.

198431008 is a deficient number, since it is larger than the sum of its proper divisors (194225564).

198431008 is a wasteful number, since it uses less digits than its factorization.

198431008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31684 (or 31676 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 198431008 is about 14086.5541563578. The cubic root of 198431008 is about 583.2702776649.

Adding to 198431008 its reverse (800134891), we get a palindrome (998565899).

The spelling of 198431008 in words is "one hundred ninety-eight million, four hundred thirty-one thousand, eight".