199994688 has 84 divisors (see below), whose sum is σ = 578985888. Its totient is φ = 65998080.

The previous prime is 199994633. The next prime is 199994689. The reversal of 199994688 is 886499991.

199994688 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 (199994689) 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, 57643 + ... + 61013.

Almost surely, 2^199994688 is an apocalyptic number.

199994688 is a gapful number since it is divisible by the number (18) 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 199994688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (289492944).

199994688 is an abundant number, since it is smaller than the sum of its proper divisors (378991200).

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

199994688 is a wasteful number, since it uses less digits than its factorization.

199994688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3492 (or 3479 counting only the distinct ones).

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

The square root of 199994688 is about 14141.9478149228. The cubic root of 199994688 is about 584.7983701360.

The spelling of 199994688 in words is "one hundred ninety-nine million, nine hundred ninety-four thousand, six hundred eighty-eight".