199799440 has 40 divisors (see below), whose sum is σ = 488986560. Its totient is φ = 75712896.

The previous prime is 199799417. The next prime is 199799441. The reversal of 199799440 is 44997991.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (199799441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64204 + ... + 67243.

It is an arithmetic number, because the mean of its divisors is an integer number (12224664).

Almost surely, 2^199799440 is an apocalyptic number.

199799440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199799440 is an abundant number, since it is smaller than the sum of its proper divisors (289187120).

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

199799440 is a wasteful number, since it uses less digits than its factorization.

199799440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131479 (or 131473 counting only the distinct ones).

The product of its (nonzero) digits is 734832, while the sum is 52.

The square root of 199799440 is about 14135.0429783570. The cubic root of 199799440 is about 584.6080019311.

The spelling of 199799440 in words is "one hundred ninety-nine million, seven hundred ninety-nine thousand, four hundred forty".