199998648 has 48 divisors (see below), whose sum is σ = 542744280. Its totient is φ = 66533184.

The previous prime is 199998637. The next prime is 199998649. The reversal of 199998648 is 846899991.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199998649) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37611 + ... + 42597.

Almost surely, 2^199998648 is an apocalyptic number.

199998648 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

199998648 is an abundant number, since it is smaller than the sum of its proper divisors (342745632).

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

199998648 is a wasteful number, since it uses less digits than its factorization.

199998648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5556 (or 5549 counting only the distinct ones).

The product of its digits is 10077696, while the sum is 63.

The square root of 199998648 is about 14142.0878232318. The cubic root of 199998648 is about 584.8022298823.

The spelling of 199998648 in words is "one hundred ninety-nine million, nine hundred ninety-eight thousand, six hundred forty-eight".