198614640 has 120 divisors (see below), whose sum is σ = 716271120. Its totient is φ = 45394944.

The previous prime is 198614639. The next prime is 198614651. The reversal of 198614640 is 46416891.

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3316 + ... + 20204.

It is an arithmetic number, because the mean of its divisors is an integer number (5968926).

Almost surely, 2^198614640 is an apocalyptic number.

198614640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 198614640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (358135560).

198614640 is an abundant number, since it is smaller than the sum of its proper divisors (517656480).

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

198614640 is a wasteful number, since it uses less digits than its factorization.

198614640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16919 (or 16906 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 198614640 is about 14093.0706377283. The cubic root of 198614640 is about 583.4501454958.

The spelling of 198614640 in words is "one hundred ninety-eight million, six hundred fourteen thousand, six hundred forty".