440004421 has 24 divisors (see below), whose sum is σ = 502759872. Its totient is φ = 383011200.

The previous prime is 440004403. The next prime is 440004427. The reversal of 440004421 is 124400044.

It is not a de Polignac number, because 440004421 - 2¹³ = 439996229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440004427) 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 23 ways as a sum of consecutive naturals, for example, 375166 + ... + 376336.

It is an arithmetic number, because the mean of its divisors is an integer number (20948328).

Almost surely, 2^440004421 is an apocalyptic number.

It is an amenable number.

440004421 is a deficient number, since it is larger than the sum of its proper divisors (62755451).

440004421 is a wasteful number, since it uses less digits than its factorization.

440004421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1273 (or 1242 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 440004421 is about 20976.2823445910. The cubic root of 440004421 is about 760.5930395457.

Adding to 440004421 its reverse (124400044), we get a palindrome (564404465).

The spelling of 440004421 in words is "four hundred forty million, four thousand, four hundred twenty-one".