198363840 has 112 divisors (see below), whose sum is σ = 635154432. Its totient is φ = 52448256.

The previous prime is 198363793. The next prime is 198363877. The reversal of 198363840 is 48363891.

It is a happy number.

198363840 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 198363792 and 198363801.

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 15 ways as a sum of consecutive naturals, for example, 121107 + ... + 122733.

Almost surely, 2^198363840 is an apocalyptic number.

198363840 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 198363840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (317577216).

198363840 is an abundant number, since it is smaller than the sum of its proper divisors (436790592).

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

198363840 is a wasteful number, since it uses less digits than its factorization.

198363840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1774 (or 1764 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 198363840 is about 14084.1698370902. The cubic root of 198363840 is about 583.2044587864.

The spelling of 198363840 in words is "one hundred ninety-eight million, three hundred sixty-three thousand, eight hundred forty".