440430420 has 72 divisors (see below), whose sum is σ = 1260381024. Its totient is φ = 114914624.

The previous prime is 440430391. The next prime is 440430443. The reversal of 440430420 is 24034044.

It is a super-2 number, since 2×440430420² = 387957909722752800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 130879 + ... + 134201.

It is an arithmetic number, because the mean of its divisors is an integer number (17505292).

Almost surely, 2^440430420 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 440430420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (630190512).

440430420 is an abundant number, since it is smaller than the sum of its proper divisors (819950604).

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

440430420 is a wasteful number, since it uses less digits than its factorization.

440430420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3429 (or 3380 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 21.

The square root of 440430420 is about 20986.4341897331. The cubic root of 440430420 is about 760.8384214470.

Adding to 440430420 its reverse (24034044), we get a palindrome (464464464).

The spelling of 440430420 in words is "four hundred forty million, four hundred thirty thousand, four hundred twenty".