688418088 has 32 divisors (see below), whose sum is σ = 1731360960. Its totient is φ = 228097280.

The previous prime is 688418063. The next prime is 688418117. The reversal of 688418088 is 880814886.

It is a self number, because there is not a number n which added to its sum of digits gives 688418088.

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, 81873 + ... + 89888.

It is an arithmetic number, because the mean of its divisors is an integer number (54105030).

Almost surely, 2^688418088 is an apocalyptic number.

It is an amenable number.

688418088 is an abundant number, since it is smaller than the sum of its proper divisors (1042942872).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

688418088 is a wasteful number, since it uses less digits than its factorization.

688418088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171937 (or 171933 counting only the distinct ones).

The product of its (nonzero) digits is 786432, while the sum is 51.

The square root of 688418088 is about 26237.7226145868. The cubic root of 688418088 is about 882.9797782264.

The spelling of 688418088 in words is "six hundred eighty-eight million, four hundred eighteen thousand, eighty-eight".