199227906 has 48 divisors (see below), whose sum is σ = 445044600. Its totient is φ = 64364544.

The previous prime is 199227887. The next prime is 199227929. The reversal of 199227906 is 609722991.

It can be written as a sum of positive squares in 4 ways, for example, as 174636225 + 24591681 = 13215^2 + 4959^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 258690 + ... + 259458.

Almost surely, 2^199227906 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 199227906, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222522300).

199227906 is an abundant number, since it is smaller than the sum of its proper divisors (245816694).

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

199227906 is a wasteful number, since it uses less digits than its factorization.

199227906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1203 (or 1200 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 199227906 is about 14114.8115821643. The cubic root of 199227906 is about 584.0500383252.

The spelling of 199227906 in words is "one hundred ninety-nine million, two hundred twenty-seven thousand, nine hundred six".