689256 has 32 divisors (see below), whose sum is σ = 1915200. Its totient is φ = 229680.

The previous prime is 689237. The next prime is 689257. The reversal of 689256 is 652986.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 689256.

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 689256.

It is not an unprimeable number, because it can be changed into a prime (689257) by changing a digit.

689256 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 7 ways as a sum of consecutive naturals, for example, 1380 + ... + 1811.

It is an arithmetic number, because the mean of its divisors is an integer number (59850).

2⁶⁸⁹²⁵⁶ is an apocalyptic number.

It is an amenable number.

689256 is an abundant number, since it is smaller than the sum of its proper divisors (1225944).

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

689256 is a wasteful number, since it uses less digits than its factorization.

689256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3206 (or 3196 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 689256 is about 830.2144301324. The cubic root of 689256 is about 88.3337874270. Note that the first 3 decimals are identical.

The spelling of 689256 in words is "six hundred eighty-nine thousand, two hundred fifty-six".