688075984 has 40 divisors (see below), whose sum is σ = 1349592192. Its totient is φ = 339816960.

The previous prime is 688075961. The next prime is 688075987. The reversal of 688075984 is 489570886.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688075987) by changing a digit.

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, 778807 + ... + 779689.

Almost surely, 2^688075984 is an apocalyptic number.

It is an amenable number.

688075984 is a deficient number, since it is larger than the sum of its proper divisors (661516208).

688075984 is a wasteful number, since it uses less digits than its factorization.

688075984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1435 (or 1429 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 55.

The square root of 688075984 is about 26231.2024886394. The cubic root of 688075984 is about 882.8334906867.

The spelling of 688075984 in words is "six hundred eighty-eight million, seventy-five thousand, nine hundred eighty-four".