199986872 has 32 divisors (see below), whose sum is σ = 382503600. Its totient is φ = 97996800.

The previous prime is 199986869. The next prime is 199986881. The reversal of 199986872 is 278689991.

It is a Harshad number since it is a multiple of its sum of digits (59).

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 302222 + ... + 302882.

Almost surely, 2^199986872 is an apocalyptic number.

It is an amenable number.

199986872 is a deficient number, since it is larger than the sum of its proper divisors (182516728).

199986872 is a wasteful number, since it uses less digits than its factorization.

199986872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1367 (or 1363 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 59.

The square root of 199986872 is about 14141.6714712229. The cubic root of 199986872 is about 584.7907518610.

The spelling of 199986872 in words is "one hundred ninety-nine million, nine hundred eighty-six thousand, eight hundred seventy-two".