689936888 has 16 divisors (see below), whose sum is σ = 1349876880. Its totient is φ = 329969728.

The previous prime is 689936887. The next prime is 689936903. The reversal of 689936888 is 888639986.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689936887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1874645 + ... + 1875012.

It is an arithmetic number, because the mean of its divisors is an integer number (84367305).

Almost surely, 2^689936888 is an apocalyptic number.

It is an amenable number.

689936888 is a deficient number, since it is larger than the sum of its proper divisors (659939992).

689936888 is a wasteful number, since it uses less digits than its factorization.

689936888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3749686 (or 3749682 counting only the distinct ones).

The product of its digits is 35831808, while the sum is 65.

The square root of 689936888 is about 26266.6497292670. The cubic root of 689936888 is about 883.6286497417.

The spelling of 689936888 in words is "six hundred eighty-nine million, nine hundred thirty-six thousand, eight hundred eighty-eight".