181768 has 8 divisors (see below), whose sum is σ = 340830. Its totient is φ = 90880.

The previous prime is 181763. The next prime is 181777. The reversal of 181768 is 867181.

It can be written as a sum of positive squares in only one way, i.e., 161604 + 20164 = 402^2 + 142^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (181763) by changing a digit.

181768 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11353 + ... + 11368.

2¹⁸¹⁷⁶⁸ is an apocalyptic number.

It is an amenable number.

181768 is a deficient number, since it is larger than the sum of its proper divisors (159062).

181768 is a wasteful number, since it uses less digits than its factorization.

181768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22727 (or 22723 counting only the distinct ones).

The product of its digits is 2688, while the sum is 31.

The square root of 181768 is about 426.3425852528. The cubic root of 181768 is about 56.6464210644.

It can be divided in two parts, 181 and 768, that added together give a palindrome (949).

The spelling of 181768 in words is "one hundred eighty-one thousand, seven hundred sixty-eight".