440242420 has 48 divisors (see below), whose sum is σ = 967292928. Its totient is φ = 168131840.

The previous prime is 440242349. The next prime is 440242423. The reversal of 440242420 is 24242044.

It is a junction number, because it is equal to n+sod(n) for n = 440242391 and 440242400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440242423) 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, 32829 + ... + 44251.

It is an arithmetic number, because the mean of its divisors is an integer number (20151936).

Almost surely, 2^440242420 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 440242420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (483646464).

440242420 is an abundant number, since it is smaller than the sum of its proper divisors (527050508).

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

440242420 is a wasteful number, since it uses less digits than its factorization.

440242420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11520 (or 11518 counting only the distinct ones).

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

The square root of 440242420 is about 20981.9546277271. The cubic root of 440242420 is about 760.7301501033.

Adding to 440242420 its reverse (24242044), we get a palindrome (464484464).

The spelling of 440242420 in words is "four hundred forty million, two hundred forty-two thousand, four hundred twenty".