689307808 has 72 divisors (see below), whose sum is σ = 1578691296. Its totient is φ = 290223360.

The previous prime is 689307793. The next prime is 689307851. The reversal of 689307808 is 808703986.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 833091 + ... + 833917.

It is an arithmetic number, because the mean of its divisors is an integer number (21926268).

Almost surely, 2^689307808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 689307808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (789345648).

689307808 is an abundant number, since it is smaller than the sum of its proper divisors (889383488).

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

689307808 is an equidigital number, since it uses as much as digits as its factorization.

689307808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 966 (or 897 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 49.

The square root of 689307808 is about 26254.6721175489. The cubic root of 689307808 is about 883.3600057766.

The spelling of 689307808 in words is "six hundred eighty-nine million, three hundred seven thousand, eight hundred eight".