198253680 has 80 divisors (see below), whose sum is σ = 634435584. Its totient is φ = 51160320.

The previous prime is 198253667. The next prime is 198253681. The reversal of 198253680 is 86352891.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198253681) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 5884 + ... + 20763.

Almost surely, 2^198253680 is an apocalyptic number.

198253680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198253680 is an abundant number, since it is smaller than the sum of its proper divisors (436181904).

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

198253680 is a wasteful number, since it uses less digits than its factorization.

198253680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26694 (or 26688 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 42.

The square root of 198253680 is about 14080.2585203539. The cubic root of 198253680 is about 583.0964792613.

The spelling of 198253680 in words is "one hundred ninety-eight million, two hundred fifty-three thousand, six hundred eighty".