68688216 has 32 divisors (see below), whose sum is σ = 190801200. Its totient is φ = 22896000.

The previous prime is 68688149. The next prime is 68688223. The reversal of 68688216 is 61288686.

It is a super-4 number, since 4×68688216⁴ (a number of 32 digits) contains 4444 as substring.

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, 158785 + ... + 159216.

Almost surely, 2^68688216 is an apocalyptic number.

It is an amenable number.

68688216 is an abundant number, since it is smaller than the sum of its proper divisors (122112984).

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

68688216 is a wasteful number, since it uses less digits than its factorization.

68688216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318016 (or 318006 counting only the distinct ones).

The product of its digits is 221184, while the sum is 45.

The square root of 68688216 is about 8287.8354230764. The cubic root of 68688216 is about 409.5378810775.

The spelling of 68688216 in words is "sixty-eight million, six hundred eighty-eight thousand, two hundred sixteen".