440221340 has 72 divisors (see below), whose sum is σ = 1009325520. Its totient is φ = 161201664.

The previous prime is 440221337. The next prime is 440221351. The reversal of 440221340 is 43122044.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 469352 + ... + 470288.

It is an arithmetic number, because the mean of its divisors is an integer number (14018410).

Almost surely, 2^440221340 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 440221340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (504662760).

440221340 is an abundant number, since it is smaller than the sum of its proper divisors (569104180).

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

440221340 is a wasteful number, since it uses less digits than its factorization.

440221340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111 (or 1096 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 440221340 is about 20981.4522852924. The cubic root of 440221340 is about 760.7180079692.

Adding to 440221340 its reverse (43122044), we get a palindrome (483343384).

The spelling of 440221340 in words is "four hundred forty million, two hundred twenty-one thousand, three hundred forty".