199805994 has 32 divisors (see below), whose sum is σ = 456018240. Its totient is φ = 64801296.

The previous prime is 199805989. The next prime is 199806001. The reversal of 199805994 is 499508991.

199805994 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

199805994 is a modest number, since divided by 5994 gives 1998 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 199805994.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48004 + ... + 51999.

It is an arithmetic number, because the mean of its divisors is an integer number (14250570).

Almost surely, 2^199805994 is an apocalyptic number.

199805994 is an abundant number, since it is smaller than the sum of its proper divisors (256212246).

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

199805994 is a wasteful number, since it uses less digits than its factorization.

199805994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100051 (or 100045 counting only the distinct ones).

The product of its (nonzero) digits is 1049760, while the sum is 54.

The square root of 199805994 is about 14135.2748116193. The cubic root of 199805994 is about 584.6143941394.

The spelling of 199805994 in words is "one hundred ninety-nine million, eight hundred five thousand, nine hundred ninety-four".