440647 has 4 divisors (see below), whose sum is σ = 446040. Its totient is φ = 435256.

The previous prime is 440641. The next prime is 440651. The reversal of 440647 is 746044.

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 440647 - 2¹⁵ = 407879 is a prime.

It is a Duffinian number.

440647 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440641) 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, 2572 + ... + 2737.

It is an arithmetic number, because the mean of its divisors is an integer number (111510).

2⁴⁴⁰⁶⁴⁷ is an apocalyptic number.

440647 is a deficient number, since it is larger than the sum of its proper divisors (5393).

440647 is an equidigital number, since it uses as much as digits as its factorization.

440647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5392.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 440647 is about 663.8124735194. The cubic root of 440647 is about 76.0963114153.

The spelling of 440647 in words is "four hundred forty thousand, six hundred forty-seven".