181242368 has 80 divisors (see below), whose sum is σ = 394141440. Its totient is φ = 82944000.

The previous prime is 181242367. The next prime is 181242371. The reversal of 181242368 is 863242181.

It is not an unprimeable number, because it can be changed into a prime (181242367) 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, 301268 + ... + 301868.

It is an arithmetic number, because the mean of its divisors is an integer number (4926768).

Almost surely, 2^181242368 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 181242368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (197070720).

181242368 is an abundant number, since it is smaller than the sum of its proper divisors (212899072).

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

181242368 is an equidigital number, since it uses as much as digits as its factorization.

181242368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669 (or 653 counting only the distinct ones).

The product of its digits is 18432, while the sum is 35.

The square root of 181242368 is about 13462.6285694882. The cubic root of 181242368 is about 565.9176546163.

The spelling of 181242368 in words is "one hundred eighty-one million, two hundred forty-two thousand, three hundred sixty-eight".