198368840 has 32 divisors (see below), whose sum is σ = 458396280. Its totient is φ = 77202432.

The previous prime is 198368839. The next prime is 198368857. The reversal of 198368840 is 48863891.

It can be written as a sum of positive squares in 4 ways, for example, as 190495204 + 7873636 = 13802^2 + 2806^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65537 + ... + 68496.

Almost surely, 2^198368840 is an apocalyptic number.

198368840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198368840 is an abundant number, since it is smaller than the sum of its proper divisors (260027440).

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

198368840 is a wasteful number, since it uses less digits than its factorization.

198368840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134081 (or 134077 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 47.

The square root of 198368840 is about 14084.3473402213. The cubic root of 198368840 is about 583.2093588693.

The spelling of 198368840 in words is "one hundred ninety-eight million, three hundred sixty-eight thousand, eight hundred forty".