8181368 has 32 divisors (see below), whose sum is σ = 16710960. Its totient is φ = 3732480.

The previous prime is 8181361. The next prime is 8181377. The reversal of 8181368 is 8631818.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8181361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9683 + ... + 10493.

Almost surely, 2^8181368 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8181368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8355480).

8181368 is an abundant number, since it is smaller than the sum of its proper divisors (8529592).

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

8181368 is a wasteful number, since it uses less digits than its factorization.

8181368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 927 (or 923 counting only the distinct ones).

The product of its digits is 9216, while the sum is 35.

The square root of 8181368 is about 2860.3090742086. The cubic root of 8181368 is about 201.5001200672.

The spelling of 8181368 in words is "eight million, one hundred eighty-one thousand, three hundred sixty-eight".