168533838 has 128 divisors (see below), whose sum is σ = 437184000. Its totient is φ = 47589120.

The previous prime is 168533803. The next prime is 168533839. The reversal of 168533838 is 838335861.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 168533793 and 168533802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168533839) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1230106 + ... + 1230242.

It is an arithmetic number, because the mean of its divisors is an integer number (3415500).

Almost surely, 2^168533838 is an apocalyptic number.

168533838 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 168533838, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (218592000).

168533838 is an abundant number, since it is smaller than the sum of its proper divisors (268650162).

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

168533838 is a wasteful number, since it uses less digits than its factorization.

168533838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287 (or 281 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 168533838 is about 12982.0583113773. The cubic root of 168533838 is about 552.3686691253.

The spelling of 168533838 in words is "one hundred sixty-eight million, five hundred thirty-three thousand, eight hundred thirty-eight".