68185404 has 36 divisors (see below), whose sum is σ = 196980784. Its totient is φ = 19481472.

The previous prime is 68185393. The next prime is 68185421. The reversal of 68185404 is 40458186.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 135037 + ... + 135540.

Almost surely, 2^68185404 is an apocalyptic number.

It is an amenable number.

68185404 is an abundant number, since it is smaller than the sum of its proper divisors (128795380).

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

68185404 is a wasteful number, since it uses less digits than its factorization.

68185404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270594 (or 270589 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 68185404 is about 8257.4453676667. The cubic root of 68185404 is about 408.5361319813.

The spelling of 68185404 in words is "sixty-eight million, one hundred eighty-five thousand, four hundred four".