181044 has 36 divisors (see below), whose sum is σ = 471744. Its totient is φ = 58512.

The previous prime is 181039. The next prime is 181061. The reversal of 181044 is 440181.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a plaindrome in base 15.

It is a congruent number.

It is an unprimeable number.

181044 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 in 11 ways as a sum of consecutive naturals, for example, 1639 + ... + 1745.

It is an arithmetic number, because the mean of its divisors is an integer number (13104).

2¹⁸¹⁰⁴⁴ 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 181044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (235872).

181044 is an abundant number, since it is smaller than the sum of its proper divisors (290700).

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

181044 is a wasteful number, since it uses less digits than its factorization.

181044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164 (or 159 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 181044 is about 425.4926556358. The cubic root of 181044 is about 56.5711115466.

The spelling of 181044 in words is "one hundred eighty-one thousand, forty-four".