68381688 has 32 divisors (see below), whose sum is σ = 171164160. Its totient is φ = 22765920.

The previous prime is 68381669. The next prime is 68381693. The reversal of 68381688 is 88618386.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29881 + ... + 32087.

It is an arithmetic number, because the mean of its divisors is an integer number (5348880).

Almost surely, 2^68381688 is an apocalyptic number.

It is an amenable number.

68381688 is an abundant number, since it is smaller than the sum of its proper divisors (102782472).

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

68381688 is a wasteful number, since it uses less digits than its factorization.

68381688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3507 (or 3503 counting only the distinct ones).

The product of its digits is 442368, while the sum is 48.

The square root of 68381688 is about 8269.3221003901. The cubic root of 68381688 is about 408.9277714328.

The spelling of 68381688 in words is "sixty-eight million, three hundred eighty-one thousand, six hundred eighty-eight".