688604512 has 48 divisors (see below), whose sum is σ = 1398019392. Its totient is φ = 333665280.

The previous prime is 688604503. The next prime is 688604551. The reversal of 688604512 is 215406886.

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, 204313 + ... + 207655.

It is an arithmetic number, because the mean of its divisors is an integer number (29125404).

Almost surely, 2^688604512 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 688604512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (699009696).

688604512 is an abundant number, since it is smaller than the sum of its proper divisors (709414880).

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

688604512 is a wasteful number, since it uses less digits than its factorization.

688604512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3551 (or 3543 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 40.

The square root of 688604512 is about 26241.2749690254. The cubic root of 688604512 is about 883.0594748374.

The spelling of 688604512 in words is "six hundred eighty-eight million, six hundred four thousand, five hundred twelve".