198840889 has 8 divisors (see below), whose sum is σ = 214332552. Its totient is φ = 183377280.

The previous prime is 198840881. The next prime is 198840893. The reversal of 198840889 is 988048891.

198840889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 960400 + 197880489 = 980^2 + 14067^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 198840889 - 2³ = 198840881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198840881) 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, 9099 + ... + 21919.

It is an arithmetic number, because the mean of its divisors is an integer number (26791569).

Almost surely, 2^198840889 is an apocalyptic number.

It is an amenable number.

198840889 is a deficient number, since it is larger than the sum of its proper divisors (15491663).

198840889 is a wasteful number, since it uses less digits than its factorization.

198840889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14027.

The product of its (nonzero) digits is 1327104, while the sum is 55.

The square root of 198840889 is about 14101.0953120671. The cubic root of 198840889 is about 583.6716043634.

The spelling of 198840889 in words is "one hundred ninety-eight million, eight hundred forty thousand, eight hundred eighty-nine".