688326872 has 32 divisors (see below), whose sum is σ = 1367830800. Its totient is φ = 323610624.

The previous prime is 688326857. The next prime is 688326893. The reversal of 688326872 is 278623886.

It is a self number, because there is not a number n which added to its sum of digits gives 688326872.

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, 209579 + ... + 212837.

Almost surely, 2^688326872 is an apocalyptic number.

It is an amenable number.

688326872 is a deficient number, since it is larger than the sum of its proper divisors (679503928).

688326872 is a wasteful number, since it uses less digits than its factorization.

688326872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4835 (or 4831 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 50.

The square root of 688326872 is about 26235.9842963819. The cubic root of 688326872 is about 882.9407779724.

The spelling of 688326872 in words is "six hundred eighty-eight million, three hundred twenty-six thousand, eight hundred seventy-two".