199988238 has 16 divisors (see below), whose sum is σ = 423504720. Its totient is φ = 62741376.

The previous prime is 199988237. The next prime is 199988291. The reversal of 199988238 is 832889991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199988237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 980233 + ... + 980436.

It is an arithmetic number, because the mean of its divisors is an integer number (26469045).

Almost surely, 2^199988238 is an apocalyptic number.

199988238 is an abundant number, since it is smaller than the sum of its proper divisors (223516482).

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

199988238 is a wasteful number, since it uses less digits than its factorization.

199988238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1960691.

The product of its digits is 2239488, while the sum is 57.

The square root of 199988238 is about 14141.7197681187. The cubic root of 199988238 is about 584.7920833190.

The spelling of 199988238 in words is "one hundred ninety-nine million, nine hundred eighty-eight thousand, two hundred thirty-eight".