199786086 has 24 divisors (see below), whose sum is σ = 433142424. Its totient is φ = 66553440.

The previous prime is 199786079. The next prime is 199786099. The reversal of 199786086 is 680687991.

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 11 ways as a sum of consecutive naturals, for example, 41665 + ... + 46211.

It is an arithmetic number, because the mean of its divisors is an integer number (18047601).

Almost surely, 2^199786086 is an apocalyptic number.

199786086 is an abundant number, since it is smaller than the sum of its proper divisors (233356338).

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

199786086 is a wasteful number, since it uses less digits than its factorization.

199786086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6996 (or 6993 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 54.

The square root of 199786086 is about 14134.5705983592. The cubic root of 199786086 is about 584.5949771545.

The spelling of 199786086 in words is "one hundred ninety-nine million, seven hundred eighty-six thousand, eighty-six".