688327696 has 45 divisors (see below), whose sum is σ = 1553028669. Its totient is φ = 294682752.

The previous prime is 688327669. The next prime is 688327699. The reversal of 688327696 is 696723886.

It is a happy number.

The square root of 688327696 is 26236.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 36240400 + 652087296 = 6020^2 + 25536^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (688327699) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 734140 + ... + 735076.

Almost surely, 2^688327696 is an apocalyptic number.

688327696 is the 26236-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 688327696

688327696 is an abundant number, since it is smaller than the sum of its proper divisors (864700973).

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

688327696 is an frugal number, since it uses more digits than its factorization.

688327696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1896 (or 946 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 55.

The cubic root of 688327696 is about 882.9411302967.

The spelling of 688327696 in words is "six hundred eighty-eight million, three hundred twenty-seven thousand, six hundred ninety-six".