998028189 has 8 divisors (see below), whose sum is σ = 1478560320. Its totient is φ = 665352108.

The previous prime is 998028179. The next prime is 998028193. The reversal of 998028189 is 981820899.

It is a happy number.

It is not a de Polignac number, because 998028189 - 2⁴ = 998028173 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998028139) 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, 18481977 + ... + 18482030.

It is an arithmetic number, because the mean of its divisors is an integer number (184820040).

Almost surely, 2^998028189 is an apocalyptic number.

It is an amenable number.

998028189 is a deficient number, since it is larger than the sum of its proper divisors (480532131).

998028189 is a wasteful number, since it uses less digits than its factorization.

998028189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36964016 (or 36964010 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 54.

The square root of 998028189 is about 31591.5841483139. The cubic root of 998028189 is about 999.3422971885.

The spelling of 998028189 in words is "nine hundred ninety-eight million, twenty-eight thousand, one hundred eighty-nine".