689329520 has 40 divisors (see below), whose sum is σ = 1748392560. Its totient is φ = 250664960.

The previous prime is 689329483. The next prime is 689329523. The reversal of 689329520 is 25923986.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689329523) 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, 390785 + ... + 392544.

It is an arithmetic number, because the mean of its divisors is an integer number (43709814).

Almost surely, 2^689329520 is an apocalyptic number.

It is an amenable number.

689329520 is an abundant number, since it is smaller than the sum of its proper divisors (1059063040).

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

689329520 is a wasteful number, since it uses less digits than its factorization.

689329520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 783353 (or 783347 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 689329520 is about 26255.0856026028. The cubic root of 689329520 is about 883.3692804484.

The spelling of 689329520 in words is "six hundred eighty-nine million, three hundred twenty-nine thousand, five hundred twenty".