199999408 has 20 divisors (see below), whose sum is σ = 442856080. Its totient is φ = 85713984.

The previous prime is 199999391. The next prime is 199999409. The reversal of 199999408 is 804999991.

It is not an unprimeable number, because it can be changed into a prime (199999409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 892743 + ... + 892966.

It is an arithmetic number, because the mean of its divisors is an integer number (22142804).

Almost surely, 2^199999408 is an apocalyptic number.

It is an amenable number.

199999408 is an abundant number, since it is smaller than the sum of its proper divisors (242856672).

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

199999408 is a wasteful number, since it uses less digits than its factorization.

199999408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1785724 (or 1785718 counting only the distinct ones).

The product of its (nonzero) digits is 1889568, while the sum is 58.

The square root of 199999408 is about 14142.1146933547. The cubic root of 199999408 is about 584.8029706358.

The spelling of 199999408 in words is "one hundred ninety-nine million, nine hundred ninety-nine thousand, four hundred eight".