199805076 has 72 divisors (see below), whose sum is σ = 526843520. Its totient is φ = 65484720.

The previous prime is 199805057. The next prime is 199805077. The reversal of 199805076 is 670508991.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199805077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 544245 + ... + 544611.

Almost surely, 2^199805076 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 199805076, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (263421760).

199805076 is an abundant number, since it is smaller than the sum of its proper divisors (327038444).

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

199805076 is a wasteful number, since it uses less digits than its factorization.

199805076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522 (or 443 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 199805076 is about 14135.2423396276. The cubic root of 199805076 is about 584.6134988095.

The spelling of 199805076 in words is "one hundred ninety-nine million, eight hundred five thousand, seventy-six".