689429680 has 20 divisors (see below), whose sum is σ = 1602924192. Its totient is φ = 275771840.

The previous prime is 689429651. The next prime is 689429681. The reversal of 689429680 is 86924986.

689429680 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (689429681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4308856 + ... + 4309015.

Almost surely, 2^689429680 is an apocalyptic number.

It is an amenable number.

689429680 is an abundant number, since it is smaller than the sum of its proper divisors (913494512).

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

689429680 is a wasteful number, since it uses less digits than its factorization.

689429680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8617884 (or 8617878 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 52.

The square root of 689429680 is about 26256.9929733014. The cubic root of 689429680 is about 883.4120630749.

The spelling of 689429680 in words is "six hundred eighty-nine million, four hundred twenty-nine thousand, six hundred eighty".