199998132 has 48 divisors (see below), whose sum is σ = 496964160. Its totient is φ = 62382592.

The previous prime is 199998131. The next prime is 199998157. The reversal of 199998132 is 231899991.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199998131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33778 + ... + 39254.

It is an arithmetic number, because the mean of its divisors is an integer number (10353420).

Almost surely, 2^199998132 is an apocalyptic number.

199998132 is a gapful number since it is divisible by the number (12) 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 199998132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (248482080).

199998132 is an abundant number, since it is smaller than the sum of its proper divisors (296966028).

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

199998132 is a wasteful number, since it uses less digits than its factorization.

199998132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5680 (or 5678 counting only the distinct ones).

The product of its digits is 314928, while the sum is 51.

The square root of 199998132 is about 14142.0695798034. The cubic root of 199998132 is about 584.8017269485.

The spelling of 199998132 in words is "one hundred ninety-nine million, nine hundred ninety-eight thousand, one hundred thirty-two".