440243424 has 240 divisors, whose sum is σ = 1398485088. Its totient is φ = 135364608.

The previous prime is 440243413. The next prime is 440243429. The reversal of 440243424 is 424342044.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440243429) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 4274157 + ... + 4274259.

Almost surely, 2^440243424 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 440243424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (699242544).

440243424 is an abundant number, since it is smaller than the sum of its proper divisors (958241664).

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

440243424 is a wasteful number, since it uses less digits than its factorization.

440243424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239 (or 222 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 27.

The square root of 440243424 is about 20981.9785530345. The cubic root of 440243424 is about 760.7307284002.

Adding to 440243424 its reverse (424342044), we get a palindrome (864585468).

The spelling of 440243424 in words is "four hundred forty million, two hundred forty-three thousand, four hundred twenty-four".