194181648 has 40 divisors (see below), whose sum is σ = 503384448. Its totient is φ = 64501632.

The previous prime is 194181607. The next prime is 194181649. The reversal of 194181648 is 846181491.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (194181649) 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 7 ways as a sum of consecutive naturals, for example, 7161 + ... + 20967.

Almost surely, 2^194181648 is an apocalyptic number.

It is an amenable number.

194181648 is an abundant number, since it is smaller than the sum of its proper divisors (309202800).

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

194181648 is a wasteful number, since it uses less digits than its factorization.

194181648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14111 (or 14105 counting only the distinct ones).

The product of its digits is 55296, while the sum is 42.

The square root of 194181648 is about 13934.9075346771. The cubic root of 194181648 is about 579.0766600660.

The spelling of 194181648 in words is "one hundred ninety-four million, one hundred eighty-one thousand, six hundred forty-eight".