68388216 has 64 divisors (see below), whose sum is σ = 185354400. Its totient is φ = 21026304.

The previous prime is 68388209. The next prime is 68388217. The reversal of 68388216 is 61288386.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68388217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52080 + ... + 53376.

Almost surely, 2^68388216 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 68388216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92677200).

68388216 is an abundant number, since it is smaller than the sum of its proper divisors (116966184).

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

68388216 is a wasteful number, since it uses less digits than its factorization.

68388216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1345 (or 1315 counting only the distinct ones).

The product of its digits is 110592, while the sum is 42.

The square root of 68388216 is about 8269.7168028899. The cubic root of 68388216 is about 408.9407836667.

The spelling of 68388216 in words is "sixty-eight million, three hundred eighty-eight thousand, two hundred sixteen".