68404686 has 24 divisors (see below), whose sum is σ = 159146280. Its totient is φ = 19544112.

The previous prime is 68404681. The next prime is 68404711. The reversal of 68404686 is 68640486.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68404681) 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 11 ways as a sum of consecutive naturals, for example, 116041 + ... + 116628.

It is an arithmetic number, because the mean of its divisors is an integer number (6631095).

Almost surely, 2^68404686 is an apocalyptic number.

68404686 is an abundant number, since it is smaller than the sum of its proper divisors (90741594).

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

68404686 is a wasteful number, since it uses less digits than its factorization.

68404686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232688 (or 232681 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 42.

The square root of 68404686 is about 8270.7125448779. The cubic root of 68404686 is about 408.9736095661.

The spelling of 68404686 in words is "sixty-eight million, four hundred four thousand, six hundred eighty-six".