198247440 has 80 divisors (see below), whose sum is σ = 616085568. Its totient is φ = 52735488.

The previous prime is 198247433. The next prime is 198247453. The reversal of 198247440 is 44742891.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132939 + ... + 134421.

Almost surely, 2^198247440 is an apocalyptic number.

198247440 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 198247440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (308042784).

198247440 is an abundant number, since it is smaller than the sum of its proper divisors (417838128).

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

198247440 is a wasteful number, since it uses less digits than its factorization.

198247440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2056 (or 2050 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 198247440 is about 14080.0369317697. The cubic root of 198247440 is about 583.0903615772.

The spelling of 198247440 in words is "one hundred ninety-eight million, two hundred forty-seven thousand, four hundred forty".