688358068 has 12 divisors (see below), whose sum is σ = 1268028160. Its totient is φ = 326064312.

The previous prime is 688358063. The next prime is 688358081. The reversal of 688358068 is 860853886.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688358063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4528596 + ... + 4528747.

Almost surely, 2^688358068 is an apocalyptic number.

It is an amenable number.

688358068 is a deficient number, since it is larger than the sum of its proper divisors (579670092).

688358068 is a wasteful number, since it uses less digits than its factorization.

688358068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9057366 (or 9057364 counting only the distinct ones).

The product of its (nonzero) digits is 2211840, while the sum is 52.

The square root of 688358068 is about 26236.5788166064. The cubic root of 688358068 is about 882.9541165017.

The spelling of 688358068 in words is "six hundred eighty-eight million, three hundred fifty-eight thousand, sixty-eight".