199711872 has 64 divisors (see below), whose sum is σ = 589437600. Its totient is φ = 66569472.

The previous prime is 199711859. The next prime is 199711891. The reversal of 199711872 is 278117991.

It is a happy number.

199711872 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25438 + ... + 32349.

Almost surely, 2^199711872 is an apocalyptic number.

199711872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

199711872 is an abundant number, since it is smaller than the sum of its proper divisors (389725728).

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

199711872 is an equidigital number, since it uses as much as digits as its factorization.

199711872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57810 (or 57792 counting only the distinct ones).

The product of its digits is 63504, while the sum is 45.

The square root of 199711872 is about 14131.9450890527. The cubic root of 199711872 is about 584.5225822150.

The spelling of 199711872 in words is "one hundred ninety-nine million, seven hundred eleven thousand, eight hundred seventy-two".