440623 has 4 divisors (see below), whose sum is σ = 466560. Its totient is φ = 414688.

The previous prime is 440581. The next prime is 440641. The reversal of 440623 is 326044.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-440623 is a prime.

It is a d-powerful number, because it can be written as 4 + 4⁹ + 6⁴ + 0 + 2⁵ + 3¹¹ .

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 440623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12943 + ... + 12976.

It is an arithmetic number, because the mean of its divisors is an integer number (116640).

2⁴⁴⁰⁶²³ is an apocalyptic number.

440623 is a deficient number, since it is larger than the sum of its proper divisors (25937).

440623 is a wasteful number, since it uses less digits than its factorization.

440623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25936.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 440623 is about 663.7943958787. The cubic root of 440623 is about 76.0949298524.

Adding to 440623 its reverse (326044), we get a palindrome (766667).

The spelling of 440623 in words is "four hundred forty thousand, six hundred twenty-three".