689808 has 40 divisors (see below), whose sum is σ = 2037568. Its totient is φ = 196992.

The previous prime is 689807. The next prime is 689827. The reversal of 689808 is 808986.

It is not an unprimeable number, because it can be changed into a prime (689803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 691 + ... + 1362.

2⁶⁸⁹⁸⁰⁸ is an apocalyptic number.

It is an amenable number.

689808 is an abundant number, since it is smaller than the sum of its proper divisors (1347760).

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

689808 is a wasteful number, since it uses less digits than its factorization.

689808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2071 (or 2065 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 39.

The square root of 689808 is about 830.5468078320. The cubic root of 689808 is about 88.3573622379.

The spelling of 689808 in words is "six hundred eighty-nine thousand, eight hundred eight".