689444 has 12 divisors (see below), whose sum is σ = 1378944. Its totient is φ = 295464.

The previous prime is 689441. The next prime is 689459. The reversal of 689444 is 444986.

689444 is an admirable number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 689444.

It is not an unprimeable number, because it can be changed into a prime (689441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12284 + ... + 12339.

It is an arithmetic number, because the mean of its divisors is an integer number (114912).

2⁶⁸⁹⁴⁴⁴ is an apocalyptic number.

It is an amenable number.

689444 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

689444 is a wasteful number, since it uses less digits than its factorization.

689444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24634 (or 24632 counting only the distinct ones).

The product of its digits is 27648, while the sum is 35.

The square root of 689444 is about 830.3276461735. The cubic root of 689444 is about 88.3418179422.

The spelling of 689444 in words is "six hundred eighty-nine thousand, four hundred forty-four".