440121223444 has 24 divisors (see below), whose sum is σ = 932021415360. Its totient is φ = 177527888256.

The previous prime is 440121223417. The next prime is 440121223459. The reversal of 440121223444 is 444322121044.

It is a happy number.

It is a super-2 number, since 2×440121223444² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 462311734 + ... + 462312685.

It is an arithmetic number, because the mean of its divisors is an integer number (38834225640).

Almost surely, 2^440121223444 is an apocalyptic number.

It is an amenable number.

440121223444 is an abundant number, since it is smaller than the sum of its proper divisors (491900191916).

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

440121223444 is a wasteful number, since it uses less digits than its factorization.

440121223444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 924624447 (or 924624445 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 31.

Adding to 440121223444 its reverse (444322121044), we get a palindrome (884443344488).

The spelling of 440121223444 in words is "four hundred forty billion, one hundred twenty-one million, two hundred twenty-three thousand, four hundred forty-four".