440491 has 4 divisors (see below), whose sum is σ = 443800. Its totient is φ = 437184.

The previous prime is 440471. The next prime is 440497. The reversal of 440491 is 194044.

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 440491 - 2¹¹ = 438443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (440497) 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, 1446 + ... + 1723.

It is an arithmetic number, because the mean of its divisors is an integer number (110950).

2⁴⁴⁰⁴⁹¹ is an apocalyptic number.

440491 is a deficient number, since it is larger than the sum of its proper divisors (3309).

440491 is a wasteful number, since it uses less digits than its factorization.

440491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3308.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 440491 is about 663.6949600532. The cubic root of 440491 is about 76.0873303596.

The spelling of 440491 in words is "four hundred forty thousand, four hundred ninety-one".