440234423 has 4 divisors (see below), whose sum is σ = 440745408. Its totient is φ = 439723440.

The previous prime is 440234411. The next prime is 440234449. The reversal of 440234423 is 324432044.

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 440234423 - 2⁶ = 440234359 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 440234392 and 440234401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440234453) 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, 254198 + ... + 255923.

It is an arithmetic number, because the mean of its divisors is an integer number (110186352).

Almost surely, 2^440234423 is an apocalyptic number.

440234423 is a deficient number, since it is larger than the sum of its proper divisors (510985).

440234423 is an equidigital number, since it uses as much as digits as its factorization.

440234423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510984.

The product of its (nonzero) digits is 9216, while the sum is 26.

The square root of 440234423 is about 20981.7640583436. The cubic root of 440234423 is about 760.7255438564.

Adding to 440234423 its reverse (324432044), we get a palindrome (764666467).

The spelling of 440234423 in words is "four hundred forty million, two hundred thirty-four thousand, four hundred twenty-three".