440181 has 32 divisors (see below), whose sum is σ = 794880. Its totient is φ = 235008.

The previous prime is 440179. The next prime is 440183. The reversal of 440181 is 181044.

It is an interprime number because it is at equal distance from previous prime (440179) and next prime (440183).

It is not a de Polignac number, because 440181 - 2¹ = 440179 is a prime.

It is a super-2 number, since 2×440181² = 387518625522, which contains 22 as substring.

440181 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3145 + ... + 3281.

It is an arithmetic number, because the mean of its divisors is an integer number (24840).

2⁴⁴⁰¹⁸¹ is an apocalyptic number.

It is an amenable number.

440181 is a deficient number, since it is larger than the sum of its proper divisors (354699).

440181 is a wasteful number, since it uses less digits than its factorization.

440181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170 (or 164 counting only the distinct ones).

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

The square root of 440181 is about 663.4613779264. The cubic root of 440181 is about 76.0694770945.

The spelling of 440181 in words is "four hundred forty thousand, one hundred eighty-one".