688866104 has 8 divisors (see below), whose sum is σ = 1291623960. Its totient is φ = 344433048.

The previous prime is 688866089. The next prime is 688866119. The reversal of 688866104 is 401668886.

It is an interprime number because it is at equal distance from previous prime (688866089) and next prime (688866119).

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

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 as a sum of consecutive naturals, namely, 43054124 + ... + 43054139.

It is an arithmetic number, because the mean of its divisors is an integer number (161452995).

Almost surely, 2^688866104 is an apocalyptic number.

It is an amenable number.

688866104 is a deficient number, since it is larger than the sum of its proper divisors (602757856).

688866104 is a wasteful number, since it uses less digits than its factorization.

688866104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86108269 (or 86108265 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 47.

The square root of 688866104 is about 26246.2588572162. The cubic root of 688866104 is about 883.1712816607.

The spelling of 688866104 in words is "six hundred eighty-eight million, eight hundred sixty-six thousand, one hundred four".