169638 has 24 divisors (see below), whose sum is σ = 395352. Its totient is φ = 48384.

The previous prime is 169633. The next prime is 169639. The reversal of 169638 is 836961.

169638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 169599 and 169608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (169633) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6 + ... + 582.

It is an arithmetic number, because the mean of its divisors is an integer number (16473).

2¹⁶⁹⁶³⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 169638, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (197676).

169638 is an abundant number, since it is smaller than the sum of its proper divisors (225714).

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

169638 is a wasteful number, since it uses less digits than its factorization.

169638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596 (or 589 counting only the distinct ones).

The product of its digits is 7776, while the sum is 33.

The square root of 169638 is about 411.8713391340. The cubic root of 169638 is about 55.3572339129.

The spelling of 169638 in words is "one hundred sixty-nine thousand, six hundred thirty-eight".