440591 has 4 divisors (see below), whose sum is σ = 463800. Its totient is φ = 417384.

The previous prime is 440581. The next prime is 440641. The reversal of 440591 is 195044.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 440591 - 2⁶ = 440527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440501) 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 3 ways as a sum of consecutive naturals, for example, 11576 + ... + 11613.

It is an arithmetic number, because the mean of its divisors is an integer number (115950).

2⁴⁴⁰⁵⁹¹ is an apocalyptic number.

440591 is a deficient number, since it is larger than the sum of its proper divisors (23209).

440591 is a wasteful number, since it uses less digits than its factorization.

440591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23208.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 440591 is about 663.7702915919. The cubic root of 440591 is about 76.0930876905.

The spelling of 440591 in words is "four hundred forty thousand, five hundred ninety-one".