688747696 has 160 divisors (see below), whose sum is σ = 1737888768. Its totient is φ = 256988160.

The previous prime is 688747687. The next prime is 688747699. The reversal of 688747696 is 696747886.

It is not an unprimeable number, because it can be changed into a prime (688747699) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 4386850 + ... + 4387006.

Almost surely, 2^688747696 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 688747696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (868944384).

688747696 is an abundant number, since it is smaller than the sum of its proper divisors (1049141072).

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

688747696 is a wasteful number, since it uses less digits than its factorization.

688747696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339 (or 333 counting only the distinct ones).

The product of its digits is 24385536, while the sum is 61.

The square root of 688747696 is about 26244.0030483156. The cubic root of 688747696 is about 883.1206765011.

The spelling of 688747696 in words is "six hundred eighty-eight million, seven hundred forty-seven thousand, six hundred ninety-six".