689681304 has 320 divisors, whose sum is σ = 2276736000. Its totient is φ = 193155840.

The previous prime is 689681303. The next prime is 689681309. The reversal of 689681304 is 403186986.

689681304 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 689681304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689681303) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 4961667 + ... + 4961805.

It is an arithmetic number, because the mean of its divisors is an integer number (7114800).

Almost surely, 2^689681304 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 689681304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1138368000).

689681304 is an abundant number, since it is smaller than the sum of its proper divisors (1587054696).

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

689681304 is a wasteful number, since it uses less digits than its factorization.

689681304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220 (or 207 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 689681304 is about 26261.7840978103. The cubic root of 689681304 is about 883.5195241865.

The spelling of 689681304 in words is "six hundred eighty-nine million, six hundred eighty-one thousand, three hundred four".