68401686 has 16 divisors (see below), whose sum is σ = 141216768. Its totient is φ = 22065000.

The previous prime is 68401667. The next prime is 68401687. The reversal of 68401686 is 68610486.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68401687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183690 + ... + 184061.

It is an arithmetic number, because the mean of its divisors is an integer number (8826048).

Almost surely, 2^68401686 is an apocalyptic number.

68401686 is an abundant number, since it is smaller than the sum of its proper divisors (72815082).

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

68401686 is a wasteful number, since it uses less digits than its factorization.

68401686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367787.

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 68401686 is about 8270.5311800392. The cubic root of 68401686 is about 408.9676307419.

The spelling of 68401686 in words is "sixty-eight million, four hundred one thousand, six hundred eighty-six".