198404594 has 8 divisors (see below), whose sum is σ = 298546668. Its totient is φ = 98889040.

The previous prime is 198404561. The next prime is 198404651. The reversal of 198404594 is 495404891.

It can be written as a sum of positive squares in 2 ways, for example, as 190081369 + 8323225 = 13787^2 + 2885^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 in 3 ways as a sum of consecutive naturals, for example, 155837 + ... + 157104.

Almost surely, 2^198404594 is an apocalyptic number.

198404594 is a deficient number, since it is larger than the sum of its proper divisors (100142074).

198404594 is a wasteful number, since it uses less digits than its factorization.

198404594 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313260.

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 198404594 is about 14085.6165644249. The cubic root of 198404594 is about 583.2443959829.

The spelling of 198404594 in words is "one hundred ninety-eight million, four hundred four thousand, five hundred ninety-four".