199965808 has 40 divisors (see below), whose sum is σ = 450055520. Its totient is φ = 84291840.

The previous prime is 199965769. The next prime is 199965811. The reversal of 199965808 is 808569991.

It is a congruent number.

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, 7803 + ... + 21466.

It is an arithmetic number, because the mean of its divisors is an integer number (11251388).

Almost surely, 2^199965808 is an apocalyptic number.

It is an amenable number.

199965808 is an abundant number, since it is smaller than the sum of its proper divisors (250089712).

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

199965808 is a wasteful number, since it uses less digits than its factorization.

199965808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29345 (or 29339 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 55.

The square root of 199965808 is about 14140.9267023063. The cubic root of 199965808 is about 584.7702197384.

The spelling of 199965808 in words is "one hundred ninety-nine million, nine hundred sixty-five thousand, eight hundred eight".