199786220 has 48 divisors (see below), whose sum is σ = 435607200. Its totient is φ = 76876800.

The previous prime is 199786207. The next prime is 199786231. The reversal of 199786220 is 22687991.

It is a happy 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, 232151 + ... + 233009.

It is an arithmetic number, because the mean of its divisors is an integer number (9075150).

Almost surely, 2^199786220 is an apocalyptic number.

199786220 is a gapful number since it is divisible by the number (10) 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 199786220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (217803600).

199786220 is an abundant number, since it is smaller than the sum of its proper divisors (235820980).

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

199786220 is a wasteful number, since it uses less digits than its factorization.

199786220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1298 (or 1296 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 199786220 is about 14134.5753385095. The cubic root of 199786220 is about 584.5951078538.

The spelling of 199786220 in words is "one hundred ninety-nine million, seven hundred eighty-six thousand, two hundred twenty".