688704424 has 16 divisors (see below), whose sum is σ = 1296234720. Its totient is φ = 343041840.

The previous prime is 688704413. The next prime is 688704431. The reversal of 688704424 is 424407886.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 161562 + ... + 165769.

It is an arithmetic number, because the mean of its divisors is an integer number (81014670).

Almost surely, 2^688704424 is an apocalyptic number.

It is an amenable number.

688704424 is a deficient number, since it is larger than the sum of its proper divisors (607530296).

688704424 is a wasteful number, since it uses less digits than its factorization.

688704424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327600 (or 327596 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 43.

The square root of 688704424 is about 26243.1786184525. The cubic root of 688704424 is about 883.1021814854.

The spelling of 688704424 in words is "six hundred eighty-eight million, seven hundred four thousand, four hundred twenty-four".