198429889 has 16 divisors (see below), whose sum is σ = 231235200. Its totient is φ = 166757760.

The previous prime is 198429839. The next prime is 198429929. The reversal of 198429889 is 988924891.

It is a cyclic number.

It is not a de Polignac number, because 198429889 - 2¹⁷ = 198298817 is a prime.

It is not an unprimeable number, because it can be changed into a prime (198429839) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 188637 + ... + 189685.

It is an arithmetic number, because the mean of its divisors is an integer number (14452200).

Almost surely, 2^198429889 is an apocalyptic number.

It is an amenable number.

198429889 is a deficient number, since it is larger than the sum of its proper divisors (32805311).

198429889 is a wasteful number, since it uses less digits than its factorization.

198429889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1560.

The product of its digits is 2985984, while the sum is 58.

The square root of 198429889 is about 14086.5144375747. The cubic root of 198429889 is about 583.2691812626.

The spelling of 198429889 in words is "one hundred ninety-eight million, four hundred twenty-nine thousand, eight hundred eighty-nine".