199988772 has 24 divisors (see below), whose sum is σ = 486929856. Its totient is φ = 63764448.

The previous prime is 199988771. The next prime is 199988773. The reversal of 199988772 is 277889991.

It is an interprime number because it is at equal distance from previous prime (199988771) and next prime (199988773).

It is not an unprimeable number, because it can be changed into a prime (199988771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 362023 + ... + 362574.

It is an arithmetic number, because the mean of its divisors is an integer number (20288744).

Almost surely, 2^199988772 is an apocalyptic number.

199988772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

199988772 is an abundant number, since it is smaller than the sum of its proper divisors (286941084).

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

199988772 is a wasteful number, since it uses less digits than its factorization.

199988772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724627 (or 724625 counting only the distinct ones).

The product of its digits is 4572288, while the sum is 60.

The square root of 199988772 is about 14141.7386484124. The cubic root of 199988772 is about 584.7926038141.

The spelling of 199988772 in words is "one hundred ninety-nine million, nine hundred eighty-eight thousand, seven hundred seventy-two".