181945368 has 192 divisors, whose sum is σ = 576201600. Its totient is φ = 51287040.

The previous prime is 181945229. The next prime is 181945397. The reversal of 181945368 is 863549181.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1610080 + ... + 1610192.

It is an arithmetic number, because the mean of its divisors is an integer number (3001050).

Almost surely, 2^181945368 is an apocalyptic number.

181945368 is a gapful number since it is divisible by the number (18) 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 181945368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (288100800).

181945368 is an abundant number, since it is smaller than the sum of its proper divisors (394256232).

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

181945368 is a wasteful number, since it uses less digits than its factorization.

181945368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262 (or 255 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 181945368 is about 13488.7126146271. The cubic root of 181945368 is about 566.6484014105.

It can be divided in two parts, 181 and 945368, that added together give a palindrome (945549).

The spelling of 181945368 in words is "one hundred eighty-one million, nine hundred forty-five thousand, three hundred sixty-eight".