199671228 has 72 divisors (see below), whose sum is σ = 542680320. Its totient is φ = 61702560.

The previous prime is 199671179. The next prime is 199671229. The reversal of 199671228 is 822176991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199671229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29043 + ... + 35253.

Almost surely, 2^199671228 is an apocalyptic number.

199671228 is a gapful number since it is divisible by the number (18) 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 199671228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (271340160).

199671228 is an abundant number, since it is smaller than the sum of its proper divisors (343009092).

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

199671228 is a wasteful number, since it uses less digits than its factorization.

199671228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6287 (or 6282 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 199671228 is about 14130.5069972737. The cubic root of 199671228 is about 584.4829268398.

The spelling of 199671228 in words is "one hundred ninety-nine million, six hundred seventy-one thousand, two hundred twenty-eight".