199850028 has 72 divisors (see below), whose sum is σ = 574387632.
Its totient is φ = 53738496.
The previous prime is 199850023. The next prime is 199850033. The reversal of 199850028 is 820058991.
It is a happy number.
199850028 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.
199850028 is a nontrivial binomial coefficient, being equal to C(19993, 2).
It is an interprime number because it is at equal distance from previous prime (199850023) and next prime (199850033).
It is a Harshad number since it is a multiple of its sum of digits (42).
It is not an unprimeable number, because it can be changed into a prime (199850023) by changing a digit.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1 + ... + 19992.
It is an arithmetic number, because the mean of its divisors is an integer number (7977606).
Almost surely, 2199850028 is an apocalyptic number.
199850028 is the 19992-nd triangular number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 199850028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (287193816).
199850028 is an abundant number, since it is smaller than the sum of its proper divisors (374537604).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
199850028 is a wasteful number, since it uses less digits than its factorization.
199850028 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 20031 (or 20022 counting only the distinct ones).
The product of its (nonzero) digits is 51840, while the sum is 42.
The square root of 199850028 is about 14136.8323184510.
The cubic root of 199850028 is about 584.6573374947.
The spelling of 199850028 in words is "one hundred ninety-nine million, eight hundred fifty thousand, twenty-eight".