199816386 has 32 divisors (see below), whose sum is σ = 498244608. Its totient is φ = 51900240.

The previous prime is 199816381. The next prime is 199816423. The reversal of 199816386 is 683618991.

It is a super-2 number, since 2×199816386² = 79853176228201992, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (199816381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 215790 + ... + 216713.

It is an arithmetic number, because the mean of its divisors is an integer number (15570144).

Almost surely, 2^199816386 is an apocalyptic number.

199816386 is an abundant number, since it is smaller than the sum of its proper divisors (298428222).

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

199816386 is a wasteful number, since it uses less digits than its factorization.

199816386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432526.

The product of its digits is 559872, while the sum is 51.

The square root of 199816386 is about 14135.6423978537. The cubic root of 199816386 is about 584.6245293166.

The spelling of 199816386 in words is "one hundred ninety-nine million, eight hundred sixteen thousand, three hundred eighty-six".