181944942 has 8 divisors (see below), whose sum is σ = 363889896. Its totient is φ = 60648312.

The previous prime is 181944941. The next prime is 181944977. The reversal of 181944942 is 249449181.

It is a happy number.

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

181944942 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 181944894 and 181944903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181944941) by changing a digit.

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, 15162073 + ... + 15162084.

It is an arithmetic number, because the mean of its divisors is an integer number (45486237).

Almost surely, 2^181944942 is an apocalyptic number.

181944942 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.

181944942 is a wasteful number, since it uses less digits than its factorization.

181944942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30324162.

The product of its digits is 82944, while the sum is 42.

The square root of 181944942 is about 13488.6968236372. The cubic root of 181944942 is about 566.6479591671.

The spelling of 181944942 in words is "one hundred eighty-one million, nine hundred forty-four thousand, nine hundred forty-two".