199807944 has 32 divisors (see below), whose sum is σ = 570880320. Its totient is φ = 57087936.

The previous prime is 199807939. The next prime is 199807967. The reversal of 199807944 is 449708991.

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, 594499 + ... + 594834.

It is an arithmetic number, because the mean of its divisors is an integer number (17840010).

Almost surely, 2^199807944 is an apocalyptic number.

199807944 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

199807944 is an abundant number, since it is smaller than the sum of its proper divisors (371072376).

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

199807944 is a wasteful number, since it uses less digits than its factorization.

199807944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1189349 (or 1189345 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 51.

The square root of 199807944 is about 14135.3437878249. The cubic root of 199807944 is about 584.6162959749.

The spelling of 199807944 in words is "one hundred ninety-nine million, eight hundred seven thousand, nine hundred forty-four".