198009994 has 16 divisors (see below), whose sum is σ = 365557248. Its totient is φ = 78333552.

The previous prime is 198009953. The next prime is 198010009. The reversal of 198009994 is 499900891.

198009994 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 543802 + ... + 544165.

It is an arithmetic number, because the mean of its divisors is an integer number (22847328).

Almost surely, 2^198009994 is an apocalyptic number.

198009994 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

198009994 is a deficient number, since it is larger than the sum of its proper divisors (167547254).

198009994 is a wasteful number, since it uses less digits than its factorization.

198009994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1087989.

The product of its (nonzero) digits is 209952, while the sum is 49.

The square root of 198009994 is about 14071.6023963158. The cubic root of 198009994 is about 582.8574745231.

The spelling of 198009994 in words is "one hundred ninety-eight million, nine thousand, nine hundred ninety-four".