199243386 has 48 divisors (see below), whose sum is σ = 469098240. Its totient is φ = 60886080.

The previous prime is 199243379. The next prime is 199243391. The reversal of 199243386 is 683342991.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1206 + ... + 19998.

It is an arithmetic number, because the mean of its divisors is an integer number (9772880).

Almost surely, 2^199243386 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 199243386, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (234549120).

199243386 is an abundant number, since it is smaller than the sum of its proper divisors (269854854).

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

199243386 is a wasteful number, since it uses less digits than its factorization.

199243386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18851 (or 18848 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 199243386 is about 14115.3599316489. The cubic root of 199243386 is about 584.0651648214.

The spelling of 199243386 in words is "one hundred ninety-nine million, two hundred forty-three thousand, three hundred eighty-six".