440561 has 8 divisors (see below), whose sum is σ = 486048. Its totient is φ = 399300.

The previous prime is 440551. The next prime is 440567. The reversal of 440561 is 165044.

It is a happy number.

It is not a de Polignac number, because 440561 - 2⁶ = 440497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (440567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1166 + ... + 1496.

It is an arithmetic number, because the mean of its divisors is an integer number (60756).

2⁴⁴⁰⁵⁶¹ is an apocalyptic number.

It is an amenable number.

440561 is a deficient number, since it is larger than the sum of its proper divisors (45487).

440561 is an equidigital number, since it uses as much as digits as its factorization.

440561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364 (or 342 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 440561 is about 663.7476930280. The cubic root of 440561 is about 76.0913605827.

It can be divided in two parts, 440 and 561, that added together give a palindrome (1001).

The spelling of 440561 in words is "four hundred forty thousand, five hundred sixty-one".