440404420 has 48 divisors (see below), whose sum is σ = 976147200. Its totient is φ = 166440960.

The previous prime is 440404417. The next prime is 440404421. The reversal of 440404420 is 24404044.

It is a junction number, because it is equal to n+sod(n) for n = 440404391 and 440404400.

It is not an unprimeable number, because it can be changed into a prime (440404421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 162436 + ... + 165124.

It is an arithmetic number, because the mean of its divisors is an integer number (20336400).

Almost surely, 2^440404420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 440404420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (488073600).

440404420 is an abundant number, since it is smaller than the sum of its proper divisors (535742780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

440404420 is a wasteful number, since it uses less digits than its factorization.

440404420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3148 (or 3146 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 22.

The square root of 440404420 is about 20985.8147328142. The cubic root of 440404420 is about 760.8234495867.

Adding to 440404420 its reverse (24404044), we get a palindrome (464808464).

The spelling of 440404420 in words is "four hundred forty million, four hundred four thousand, four hundred twenty".