689838 has 8 divisors (see below), whose sum is σ = 1379688. Its totient is φ = 229944.

The previous prime is 689831. The next prime is 689851. The reversal of 689838 is 838986.

689838 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

689838 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 689838.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57481 + ... + 57492.

It is an arithmetic number, because the mean of its divisors is an integer number (172461).

2⁶⁸⁹⁸³⁸ is an apocalyptic number.

689838 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.

689838 is a wasteful number, since it uses less digits than its factorization.

689838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114978.

The product of its digits is 82944, while the sum is 42.

The square root of 689838 is about 830.5648680266. The cubic root of 689838 is about 88.3586431172.

The spelling of 689838 in words is "six hundred eighty-nine thousand, eight hundred thirty-eight".