198134988 has 24 divisors (see below), whose sum is σ = 471039408. Its totient is φ = 64798656.

The previous prime is 198134987. The next prime is 198135019. The reversal of 198134988 is 889431891.

It is a super-3 number, since 3×198134988³ (a number of 26 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 198134988.

It is not an unprimeable number, because it can be changed into a prime (198134987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155131 + ... + 156402.

It is an arithmetic number, because the mean of its divisors is an integer number (19626642).

Almost surely, 2^198134988 is an apocalyptic number.

It is an amenable number.

198134988 is an abundant number, since it is smaller than the sum of its proper divisors (272904420).

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

198134988 is a wasteful number, since it uses less digits than its factorization.

198134988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311593 (or 311591 counting only the distinct ones).

The product of its digits is 497664, while the sum is 51.

The square root of 198134988 is about 14076.0430519376. The cubic root of 198134988 is about 582.9800918406.

The spelling of 198134988 in words is "one hundred ninety-eight million, one hundred thirty-four thousand, nine hundred eighty-eight".