168143856 has 80 divisors (see below), whose sum is σ = 452352000. Its totient is φ = 53754624.

The previous prime is 168143813. The next prime is 168143861. The reversal of 168143856 is 658341861.

It is a zygodrome in base 4.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 276705 + ... + 277311.

It is an arithmetic number, because the mean of its divisors is an integer number (5654400).

Almost surely, 2^168143856 is an apocalyptic number.

168143856 is a gapful number since it is divisible by the number (16) 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 168143856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (226176000).

168143856 is an abundant number, since it is smaller than the sum of its proper divisors (284208144).

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

168143856 is a wasteful number, since it uses less digits than its factorization.

168143856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 846 (or 840 counting only the distinct ones).

The product of its digits is 138240, while the sum is 42.

The square root of 168143856 is about 12967.0295750415. The cubic root of 168143856 is about 551.9422855012.

The spelling of 168143856 in words is "one hundred sixty-eight million, one hundred forty-three thousand, eight hundred fifty-six".