688228216 has 16 divisors (see below), whose sum is σ = 1389691800. Its totient is φ = 317643744.

The previous prime is 688228193. The next prime is 688228243. The reversal of 688228216 is 612822886.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3308686 + ... + 3308893.

Almost surely, 2^688228216 is an apocalyptic number.

It is an amenable number.

688228216 is an abundant number, since it is smaller than the sum of its proper divisors (701463584).

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

688228216 is a wasteful number, since it uses less digits than its factorization.

688228216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6617598 (or 6617594 counting only the distinct ones).

The product of its digits is 147456, while the sum is 43.

The square root of 688228216 is about 26234.1040632227. The cubic root of 688228216 is about 882.8985927980.

The spelling of 688228216 in words is "six hundred eighty-eight million, two hundred twenty-eight thousand, two hundred sixteen".