168644 has 24 divisors (see below), whose sum is σ = 356160. Its totient is φ = 68256.

The previous prime is 168643. The next prime is 168673. The reversal of 168644 is 446861.

168644 = T₂₁₆ + T₂₁₇ + ... + T₂₂₂.

168644 is nontrivially palindromic in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168643) 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 7 ways as a sum of consecutive naturals, for example, 374 + ... + 690.

It is an arithmetic number, because the mean of its divisors is an integer number (14840).

2¹⁶⁸⁶⁴⁴ is an apocalyptic number.

168644 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 168644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (178080).

168644 is an abundant number, since it is smaller than the sum of its proper divisors (187516).

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

168644 is a wasteful number, since it uses less digits than its factorization.

168644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347 (or 345 counting only the distinct ones).

The product of its digits is 4608, while the sum is 29.

The square root of 168644 is about 410.6628787704. The cubic root of 168644 is about 55.2488994683.

The spelling of 168644 in words is "one hundred sixty-eight thousand, six hundred forty-four".