689839520 has 48 divisors (see below), whose sum is σ = 1660516200. Its totient is φ = 270726144.

The previous prime is 689839499. The next prime is 689839523. The reversal of 689839520 is 25938986.

It can be written as a sum of positive squares in 4 ways, for example, as 403688464 + 286151056 = 20092^2 + 16916^2 .

It is not an unprimeable number, because it can be changed into a prime (689839523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32195 + ... + 49154.

Almost surely, 2^689839520 is an apocalyptic number.

It is an amenable number.

689839520 is an abundant number, since it is smaller than the sum of its proper divisors (970676680).

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

689839520 is a wasteful number, since it uses less digits than its factorization.

689839520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81417 (or 81409 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 50.

The square root of 689839520 is about 26264.7962108980. The cubic root of 689839520 is about 883.5870801414.

The spelling of 689839520 in words is "six hundred eighty-nine million, eight hundred thirty-nine thousand, five hundred twenty".