688708216 has 64 divisors (see below), whose sum is σ = 1577188800. Its totient is φ = 275208192.

The previous prime is 688708213. The next prime is 688708217. The reversal of 688708216 is 612807886.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688708213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100450 + ... + 107086.

It is an arithmetic number, because the mean of its divisors is an integer number (24643575).

Almost surely, 2^688708216 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 688708216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (788594400).

688708216 is an abundant number, since it is smaller than the sum of its proper divisors (888480584).

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

688708216 is a wasteful number, since it uses less digits than its factorization.

688708216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6776 (or 6772 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 46.

The square root of 688708216 is about 26243.2508656988. The cubic root of 688708216 is about 883.1038022665.

The spelling of 688708216 in words is "six hundred eighty-eight million, seven hundred eight thousand, two hundred sixteen".