688077696 has 64 divisors (see below), whose sum is σ = 1831556880. Its totient is φ = 228876288.

The previous prime is 688077673. The next prime is 688077707. The reversal of 688077696 is 696770886.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212280 + ... + 215496.

Almost surely, 2^688077696 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 688077696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (915778440).

688077696 is an abundant number, since it is smaller than the sum of its proper divisors (1143479184).

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

688077696 is a wasteful number, since it uses less digits than its factorization.

688077696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3791 (or 3779 counting only the distinct ones).

The product of its (nonzero) digits is 6096384, while the sum is 57.

The square root of 688077696 is about 26231.2351215111. The cubic root of 688077696 is about 882.8342228780.

The spelling of 688077696 in words is "six hundred eighty-eight million, seventy-seven thousand, six hundred ninety-six".