688675658 has 16 divisors (see below), whose sum is σ = 1127338560. Its totient is φ = 312919200.

The previous prime is 688675619. The next prime is 688675667. The reversal of 688675658 is 856576886.

It is a junction number, because it is equal to n+sod(n) for n = 688675597 and 688675606.

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 7 ways as a sum of consecutive naturals, for example, 93038 + ... + 100166.

It is an arithmetic number, because the mean of its divisors is an integer number (70458660).

Almost surely, 2^688675658 is an apocalyptic number.

688675658 is a deficient number, since it is larger than the sum of its proper divisors (438662902).

688675658 is a wasteful number, since it uses less digits than its factorization.

688675658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11533.

The product of its digits is 19353600, while the sum is 59.

The square root of 688675658 is about 26242.6305464982. The cubic root of 688675658 is about 883.0898860942.

The spelling of 688675658 in words is "six hundred eighty-eight million, six hundred seventy-five thousand, six hundred fifty-eight".