199998234 has 56 divisors (see below), whose sum is σ = 476307540. Its totient is φ = 62736768.

The previous prime is 199998221. The next prime is 199998241. The reversal of 199998234 is 432899991.

It can be written as a sum of positive squares in 2 ways, for example, as 190357209 + 9641025 = 13797^2 + 3105^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 20752 + ... + 28820.

Almost surely, 2^199998234 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 199998234, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (238153770).

199998234 is an abundant number, since it is smaller than the sum of its proper divisors (276309306).

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

199998234 is an equidigital number, since it uses as much as digits as its factorization.

199998234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8106 (or 8091 counting only the distinct ones).

The product of its digits is 1259712, while the sum is 54.

The square root of 199998234 is about 14142.0731860643. The cubic root of 199998234 is about 584.8018263657.

The spelling of 199998234 in words is "one hundred ninety-nine million, nine hundred ninety-eight thousand, two hundred thirty-four".