198020240 has 40 divisors (see below), whose sum is σ = 502253568. Its totient is φ = 72007040.

The previous prime is 198020239. The next prime is 198020269. The reversal of 198020240 is 42020891.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111632 + ... + 113391.

Almost surely, 2^198020240 is an apocalyptic number.

198020240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198020240 is an abundant number, since it is smaller than the sum of its proper divisors (304233328).

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

198020240 is a wasteful number, since it uses less digits than its factorization.

198020240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225047 (or 225041 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 198020240 is about 14071.9664581749. The cubic root of 198020240 is about 582.8675276431.

The spelling of 198020240 in words is "one hundred ninety-eight million, twenty thousand, two hundred forty".