185668404 has 12 divisors (see below), whose sum is σ = 433226304. Its totient is φ = 61889464.

The previous prime is 185668403. The next prime is 185668423. The reversal of 185668404 is 404866581.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (185668403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7736172 + ... + 7736195.

It is an arithmetic number, because the mean of its divisors is an integer number (36102192).

Almost surely, 2^185668404 is an apocalyptic number.

It is an amenable number.

185668404 is an abundant number, since it is smaller than the sum of its proper divisors (247557900).

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

185668404 is a wasteful number, since it uses less digits than its factorization.

185668404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15472374 (or 15472372 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 42.

The square root of 185668404 is about 13626.0193747110. The cubic root of 185668404 is about 570.4873271573.

The spelling of 185668404 in words is "one hundred eighty-five million, six hundred sixty-eight thousand, four hundred four".