199968750 has 140 divisors (see below), whose sum is σ = 567180240. Its totient is φ = 52650000.

The previous prime is 199968737. The next prime is 199968751. The reversal of 199968750 is 57869991.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199968751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 69 ways as a sum of consecutive naturals, for example, 2531211 + ... + 2531289.

Almost surely, 2^199968750 is an apocalyptic number.

199968750 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 199968750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (283590120).

199968750 is an abundant number, since it is smaller than the sum of its proper divisors (367211490).

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

199968750 is an frugal number, since it uses more digits than its factorization.

199968750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123 (or 89 counting only the distinct ones).

The product of its (nonzero) digits is 1224720, while the sum is 54.

The square root of 199968750 is about 14141.0307262236. The cubic root of 199968750 is about 584.7730875379.

The spelling of 199968750 in words is "one hundred ninety-nine million, nine hundred sixty-eight thousand, seven hundred fifty".