688803998 has 32 divisors (see below), whose sum is σ = 1131904800. Its totient is φ = 313117056.

The previous prime is 688803967. The next prime is 688804001. The reversal of 688803998 is 899308886.

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 in 15 ways as a sum of consecutive naturals, for example, 188840 + ... + 192452.

It is an arithmetic number, because the mean of its divisors is an integer number (35372025).

Almost surely, 2^688803998 is an apocalyptic number.

688803998 is a deficient number, since it is larger than the sum of its proper divisors (443100802).

688803998 is a wasteful number, since it uses less digits than its factorization.

688803998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3836.

The product of its (nonzero) digits is 5971968, while the sum is 59.

The square root of 688803998 is about 26245.0756904986. The cubic root of 688803998 is about 883.1447395486.

The spelling of 688803998 in words is "six hundred eighty-eight million, eight hundred three thousand, nine hundred ninety-eight".