198838568404 has 48 divisors (see below), whose sum is σ = 415764631296. Its totient is φ = 81354873600.

The previous prime is 198838568329. The next prime is 198838568441. The reversal of 198838568404 is 404865838891.

It is a happy number.

It is a congruent number.

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, 39214 + ... + 631834.

It is an arithmetic number, because the mean of its divisors is an integer number (8661763152).

Almost surely, 2^198838568404 is an apocalyptic number.

198838568404 is a gapful number since it is divisible by the number (14) 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 198838568404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (207882315648).

198838568404 is an abundant number, since it is smaller than the sum of its proper divisors (216926062892).

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

198838568404 is a wasteful number, since it uses less digits than its factorization.

198838568404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593176 (or 593174 counting only the distinct ones).

The product of its (nonzero) digits is 53084160, while the sum is 64.

The spelling of 198838568404 in words is "one hundred ninety-eight billion, eight hundred thirty-eight million, five hundred sixty-eight thousand, four hundred four".