168181992 has 96 divisors (see below), whose sum is σ = 501003360. Its totient is φ = 50544000.

The previous prime is 168181967. The next prime is 168182023. The reversal of 168181992 is 299181861.

168181992 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 102942 + ... + 104562.

It is an arithmetic number, because the mean of its divisors is an integer number (5218785).

Almost surely, 2^168181992 is an apocalyptic number.

168181992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is a pronic number, being equal to 12968×12969.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 168181992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (250501680).

168181992 is an abundant number, since it is smaller than the sum of its proper divisors (332821368).

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

168181992 is a wasteful number, since it uses less digits than its factorization.

168181992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1775 (or 1768 counting only the distinct ones).

The product of its digits is 62208, while the sum is 45.

The square root of 168181992 is about 12968.4999903613. The cubic root of 168181992 is about 551.9840102489.

It can be divided in two parts, 16818199 and 2, that added together give a square (16818201 = 4101²).

The spelling of 168181992 in words is "one hundred sixty-eight million, one hundred eighty-one thousand, nine hundred ninety-two".