440221312 has 16 divisors (see below), whose sum is σ = 877003650. Its totient is φ = 220110592.

The previous prime is 440221283. The next prime is 440221319. The reversal of 440221312 is 213122044.

It can be written as a sum of positive squares in only one way, i.e., 405458496 + 34762816 = 20136^2 + 5896^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a self number, because there is not a number n which added to its sum of digits gives 440221312.

It is not an unprimeable number, because it can be changed into a prime (440221319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1719487 + ... + 1719742.

Almost surely, 2^440221312 is an apocalyptic number.

It is an amenable number.

440221312 is a deficient number, since it is larger than the sum of its proper divisors (436782338).

440221312 is an equidigital number, since it uses as much as digits as its factorization.

440221312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3439243 (or 3439231 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 440221312 is about 20981.4516180363. The cubic root of 440221312 is about 760.7179918409.

Adding to 440221312 its reverse (213122044), we get a palindrome (653343356).

The spelling of 440221312 in words is "four hundred forty million, two hundred twenty-one thousand, three hundred twelve".