68688768 has 32 divisors (see below), whose sum is σ = 182455560. Its totient is φ = 22896128.

The previous prime is 68688709. The next prime is 68688769. The reversal of 68688768 is 86788686.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68688769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89055 + ... + 89822.

Almost surely, 2^68688768 is an apocalyptic number.

It is an amenable number.

68688768 is an abundant number, since it is smaller than the sum of its proper divisors (113766792).

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

68688768 is a wasteful number, since it uses less digits than its factorization.

68688768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178894 (or 178882 counting only the distinct ones).

The product of its digits is 6193152, while the sum is 57.

The square root of 68688768 is about 8287.8687248291. The cubic root of 68688768 is about 409.5389781328.

The spelling of 68688768 in words is "sixty-eight million, six hundred eighty-eight thousand, seven hundred sixty-eight".