993984018 has 8 divisors (see below), whose sum is σ = 1987968048. Its totient is φ = 331328004.

The previous prime is 993983981. The next prime is 993984049. The reversal of 993984018 is 810489399.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

993984018 is an admirable number.

It is an unprimeable number.

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, 82831996 + ... + 82832007.

It is an arithmetic number, because the mean of its divisors is an integer number (248496006).

Almost surely, 2^993984018 is an apocalyptic number.

993984018 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

993984018 is a wasteful number, since it uses less digits than its factorization.

993984018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165664008.

The product of its (nonzero) digits is 559872, while the sum is 51.

The square root of 993984018 is about 31527.5120807209. The cubic root of 993984018 is about 997.9906378346.

The spelling of 993984018 in words is "nine hundred ninety-three million, nine hundred eighty-four thousand, eighteen".