198134990 has 16 divisors (see below), whose sum is σ = 357795360. Its totient is φ = 78997920.

The previous prime is 198134987. The next prime is 198135019. The reversal of 198134990 is 99431891.

It is a super-3 number, since 3×198134990³ (a number of 26 digits) contains 333 as substring.

It is a Curzon number.

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 in 7 ways as a sum of consecutive naturals, for example, 28745 + ... + 34964.

It is an arithmetic number, because the mean of its divisors is an integer number (22362210).

Almost surely, 2^198134990 is an apocalyptic number.

198134990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

198134990 is a deficient number, since it is larger than the sum of its proper divisors (159660370).

198134990 is a wasteful number, since it uses less digits than its factorization.

198134990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64027.

The product of its (nonzero) digits is 69984, while the sum is 44.

The square root of 198134990 is about 14076.0431229803. The cubic root of 198134990 is about 582.9800938021.

The spelling of 198134990 in words is "one hundred ninety-eight million, one hundred thirty-four thousand, nine hundred ninety".