198072558 has 48 divisors (see below), whose sum is σ = 447174000. Its totient is φ = 63308160.

The previous prime is 198072557. The next prime is 198072583. The reversal of 198072558 is 855270891.

It is a happy number.

198072558 is a `hidden beast` number, since 1 + 98 + 0 + 7 + 2 + 558 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198072557) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 41268 + ... + 45816.

It is an arithmetic number, because the mean of its divisors is an integer number (9316125).

Almost surely, 2^198072558 is an apocalyptic number.

198072558 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

198072558 is an abundant number, since it is smaller than the sum of its proper divisors (249101442).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

198072558 is a wasteful number, since it uses less digits than its factorization.

198072558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4657 (or 4654 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 45.

The square root of 198072558 is about 14073.8252795748. The cubic root of 198072558 is about 582.9188553560.

The spelling of 198072558 in words is "one hundred ninety-eight million, seventy-two thousand, five hundred fifty-eight".