689528 has 24 divisors (see below), whose sum is σ = 1504800. Its totient is φ = 295344.

The previous prime is 689509. The next prime is 689551. The reversal of 689528 is 825986.

It is a junction number, because it is equal to n+sod(n) for n = 689491 and 689500.

It is a congruent number.

It is an unprimeable number.

689528 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 488 + ... + 1271.

It is an arithmetic number, because the mean of its divisors is an integer number (62700).

2⁶⁸⁹⁵²⁸ is an apocalyptic number.

It is an amenable number.

689528 is an abundant number, since it is smaller than the sum of its proper divisors (815272).

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

689528 is a wasteful number, since it uses less digits than its factorization.

689528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1779 (or 1768 counting only the distinct ones).

The product of its digits is 34560, while the sum is 38.

The square root of 689528 is about 830.3782270749. The cubic root of 689528 is about 88.3454055729.

The spelling of 689528 in words is "six hundred eighty-nine thousand, five hundred twenty-eight".