688005328 has 10 divisors (see below), whose sum is σ = 1333010354. Its totient is φ = 344002656.

The previous prime is 688005301. The next prime is 688005337. The reversal of 688005328 is 823500886.

It can be written as a sum of positive squares in only one way, i.e., 687907984 + 97344 = 26228^2 + 312^2 .

688005328 is a modest number, since divided by 5328 gives 688 as remainder.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21500151 + ... + 21500182.

Almost surely, 2^688005328 is an apocalyptic number.

It is an amenable number.

688005328 is a deficient number, since it is larger than the sum of its proper divisors (645005026).

688005328 is a wasteful number, since it uses less digits than its factorization.

688005328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43000341 (or 43000335 counting only the distinct ones).

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

The square root of 688005328 is about 26229.8556610592. The cubic root of 688005328 is about 882.8032713409.

The spelling of 688005328 in words is "six hundred eighty-eight million, five thousand, three hundred twenty-eight".