68306688 has 108 divisors (see below), whose sum is σ = 205667280. Its totient is φ = 21762048.

The previous prime is 68306683. The next prime is 68306713. The reversal of 68306688 is 88660386.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68306683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52348 + ... + 53636.

Almost surely, 2^68306688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68306688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102833640).

68306688 is an abundant number, since it is smaller than the sum of its proper divisors (137360592).

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

68306688 is a wasteful number, since it uses less digits than its factorization.

68306688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1334 (or 1317 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The square root of 68306688 is about 8264.7860226385. The cubic root of 68306688 is about 408.7782148130.

The spelling of 68306688 in words is "sixty-eight million, three hundred six thousand, six hundred eighty-eight".