198028911 has 8 divisors (see below), whose sum is σ = 266461360. Its totient is φ = 130807872.

The previous prime is 198028891. The next prime is 198028913. The reversal of 198028911 is 119820891.

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

It is not a de Polignac number, because 198028911 - 2⁵ = 198028879 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 198028911.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198028913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 302470 + ... + 303123.

It is an arithmetic number, because the mean of its divisors is an integer number (33307670).

Almost surely, 2^198028911 is an apocalyptic number.

198028911 is a deficient number, since it is larger than the sum of its proper divisors (68432449).

198028911 is a wasteful number, since it uses less digits than its factorization.

198028911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605705.

The product of its (nonzero) digits is 10368, while the sum is 39.

The square root of 198028911 is about 14072.2745496242. The cubic root of 198028911 is about 582.8760351414.

The spelling of 198028911 in words is "one hundred ninety-eight million, twenty-eight thousand, nine hundred eleven".