440424401 has 4 divisors (see below), whose sum is σ = 459573312. Its totient is φ = 421275492.

The previous prime is 440424379. The next prime is 440424461. The reversal of 440424401 is 104424044.

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 not a de Polignac number, because 440424401 - 2¹⁸ = 440162257 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 19148887 = 440424401 / (4 + 4 + 0 + 4 + 2 + 4 + 4 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (440424461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9574421 + ... + 9574466.

It is an arithmetic number, because the mean of its divisors is an integer number (114893328).

Almost surely, 2^440424401 is an apocalyptic number.

It is an amenable number.

440424401 is a deficient number, since it is larger than the sum of its proper divisors (19148911).

440424401 is a wasteful number, since it uses less digits than its factorization.

440424401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19148910.

The product of its (nonzero) digits is 2048, while the sum is 23.

The square root of 440424401 is about 20986.2907870829. The cubic root of 440424401 is about 760.8349555138.

Adding to 440424401 its reverse (104424044), we get a palindrome (544848445).

The spelling of 440424401 in words is "four hundred forty million, four hundred twenty-four thousand, four hundred one".