440512220 has 12 divisors (see below), whose sum is σ = 925075704. Its totient is φ = 176204880.

The previous prime is 440512217. The next prime is 440512229. The reversal of 440512220 is 22215044.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 22025611 = 440512220 / (4 + 4 + 0 + 5 + 1 + 2 + 2 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 440512192 and 440512201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440512229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11012786 + ... + 11012825.

It is an arithmetic number, because the mean of its divisors is an integer number (77089642).

Almost surely, 2^440512220 is an apocalyptic number.

It is an amenable number.

440512220 is an abundant number, since it is smaller than the sum of its proper divisors (484563484).

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

440512220 is a wasteful number, since it uses less digits than its factorization.

440512220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22025620 (or 22025618 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 440512220 is about 20988.3829772567. The cubic root of 440512220 is about 760.8855213804.

Adding to 440512220 its reverse (22215044), we get a palindrome (462727264).

The spelling of 440512220 in words is "four hundred forty million, five hundred twelve thousand, two hundred twenty".