440621 has 4 divisors (see below), whose sum is σ = 450912. Its totient is φ = 430332.

The previous prime is 440581. The next prime is 440641. The reversal of 440621 is 126044.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-440621 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 440621.

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, 5081 + ... + 5166.

It is an arithmetic number, because the mean of its divisors is an integer number (112728).

2⁴⁴⁰⁶²¹ is an apocalyptic number.

It is an amenable number.

440621 is a deficient number, since it is larger than the sum of its proper divisors (10291).

440621 is a wasteful number, since it uses less digits than its factorization.

440621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10290.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 440621 is about 663.7928893864. The cubic root of 440621 is about 76.0948147199.

Adding to 440621 its reverse (126044), we get a palindrome (566665).

The spelling of 440621 in words is "four hundred forty thousand, six hundred twenty-one".