689238 has 36 divisors (see below), whose sum is σ = 1657188. Its totient is φ = 205320.

The previous prime is 689237. The next prime is 689257. The reversal of 689238 is 832986.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689233) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 11653 + ... + 11711.

It is an arithmetic number, because the mean of its divisors is an integer number (46033).

2⁶⁸⁹²³⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 689238, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (828594).

689238 is an abundant number, since it is smaller than the sum of its proper divisors (967950).

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

689238 is a wasteful number, since it uses less digits than its factorization.

689238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137 (or 75 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 689238 is about 830.2035894887. The cubic root of 689238 is about 88.3330184712. Note that the first 3 decimals are identical.

The spelling of 689238 in words is "six hundred eighty-nine thousand, two hundred thirty-eight".