440581 has 2 divisors, whose sum is σ = 440582. Its totient is φ = 440580.

The previous prime is 440579. The next prime is 440641. The reversal of 440581 is 185044.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 396900 + 43681 = 630^2 + 209^2 .

It is a cyclic number.

It is not a de Polignac number, because 440581 - 2¹ = 440579 is a prime.

It is a super-2 number, since 2×440581² = 388223235122, which contains 22 as substring.

Together with 440579, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (440501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220290 + 220291.

It is an arithmetic number, because the mean of its divisors is an integer number (220291).

2⁴⁴⁰⁵⁸¹ is an apocalyptic number.

It is an amenable number.

440581 is a deficient number, since it is larger than the sum of its proper divisors (1).

440581 is an equidigital number, since it uses as much as digits as its factorization.

440581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 440581 is about 663.7627588228. The cubic root of 440581 is about 76.0925119966.

The spelling of 440581 in words is "four hundred forty thousand, five hundred eighty-one".