181944894 has 8 divisors (see below), whose sum is σ = 363889800. Its totient is φ = 60648296.

The previous prime is 181944887. The next prime is 181944923. The reversal of 181944894 is 498449181.

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

181944894 is an admirable number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 15162069 + ... + 15162080.

It is an arithmetic number, because the mean of its divisors is an integer number (45486225).

Almost surely, 2^181944894 is an apocalyptic number.

181944894 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.

181944894 is a wasteful number, since it uses less digits than its factorization.

181944894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30324154.

The product of its digits is 331776, while the sum is 48.

The square root of 181944894 is about 13488.6950443696. The cubic root of 181944894 is about 566.6479093368.

The spelling of 181944894 in words is "one hundred eighty-one million, nine hundred forty-four thousand, eight hundred ninety-four".