199983678 has 16 divisors (see below), whose sum is σ = 401104656. Its totient is φ = 66471680.

The previous prime is 199983673. The next prime is 199983701. The reversal of 199983678 is 876389991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199983673) 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, 45093 + ... + 49328.

It is an arithmetic number, because the mean of its divisors is an integer number (25069041).

Almost surely, 2^199983678 is an apocalyptic number.

199983678 is an abundant number, since it is smaller than the sum of its proper divisors (201120978).

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

199983678 is a wasteful number, since it uses less digits than its factorization.

199983678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94779.

The product of its digits is 5878656, while the sum is 60.

The square root of 199983678 is about 14141.5585421127. The cubic root of 199983678 is about 584.7876386039.

It can be divided in two parts, 199983 and 678, that added together give a triangular number (200661 = T₆₃₃).

The spelling of 199983678 in words is "one hundred ninety-nine million, nine hundred eighty-three thousand, six hundred seventy-eight".