198889140 has 24 divisors (see below), whose sum is σ = 556889760. Its totient is φ = 53037088.

The previous prime is 198889129. The next prime is 198889199. The reversal of 198889140 is 41988891.

It is a self number, because there is not a number n which added to its sum of digits gives 198889140.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1657350 + ... + 1657469.

It is an arithmetic number, because the mean of its divisors is an integer number (23203740).

Almost surely, 2^198889140 is an apocalyptic number.

198889140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198889140 is an abundant number, since it is smaller than the sum of its proper divisors (358000620).

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

198889140 is a wasteful number, since it uses less digits than its factorization.

198889140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3314831 (or 3314829 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 48.

The square root of 198889140 is about 14102.8061037511. The cubic root of 198889140 is about 583.7188120597.

The spelling of 198889140 in words is "one hundred ninety-eight million, eight hundred eighty-nine thousand, one hundred forty".