689089920 has 64 divisors (see below), whose sum is σ = 2196480240. Its totient is φ = 183756800.

The previous prime is 689089901. The next prime is 689089927. The reversal of 689089920 is 29980986.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689089927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177531 + ... + 181370.

Almost surely, 2^689089920 is an apocalyptic number.

689089920 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

689089920 is an abundant number, since it is smaller than the sum of its proper divisors (1507390320).

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

689089920 is a wasteful number, since it uses less digits than its factorization.

689089920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358923 (or 358911 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 51.

The square root of 689089920 is about 26250.5222805185. The cubic root of 689089920 is about 883.2669202076.

The spelling of 689089920 in words is "six hundred eighty-nine million, eighty-nine thousand, nine hundred twenty".