440201423 has 4 divisors (see below), whose sum is σ = 444739680. Its totient is φ = 435663168.

The previous prime is 440201381. The next prime is 440201429. The reversal of 440201423 is 324102044.

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 440201423 - 2¹⁰ = 440200399 is a prime.

It is a super-2 number, since 2×440201423² = 387554585622449858, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 440201395 and 440201404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440201429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2268983 + ... + 2269176.

It is an arithmetic number, because the mean of its divisors is an integer number (111184920).

Almost surely, 2^440201423 is an apocalyptic number.

440201423 is a deficient number, since it is larger than the sum of its proper divisors (4538257).

440201423 is an equidigital number, since it uses as much as digits as its factorization.

440201423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4538256.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 440201423 is about 20980.9776464301. The cubic root of 440201423 is about 760.7065353699.

Adding to 440201423 its reverse (324102044), we get a palindrome (764303467).

The spelling of 440201423 in words is "four hundred forty million, two hundred one thousand, four hundred twenty-three".