1440220532 has 24 divisors (see below), whose sum is σ = 2641294656. Its totient is φ = 685834688.

The previous prime is 1440220531. The next prime is 1440220559. The reversal of 1440220532 is 2350220441.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a junction number, because it is equal to n+sod(n) for n = 1440220498 and 1440220507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440220531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12158 + ... + 55029.

It is an arithmetic number, because the mean of its divisors is an integer number (110053944).

Almost surely, 2^1440220532 is an apocalyptic number.

It is an amenable number.

1440220532 is a deficient number, since it is larger than the sum of its proper divisors (1201074124).

1440220532 is a wasteful number, since it uses less digits than its factorization.

1440220532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67447 (or 67445 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 1440220532 is about 37950.2375750139. The cubic root of 1440220532 is about 1129.3008785362.

Adding to 1440220532 its reverse (2350220441), we get a palindrome (3790440973).

Subtracting 1440220532 from its reverse (2350220441), we obtain a palindrome (909999909).

The spelling of 1440220532 in words is "one billion, four hundred forty million, two hundred twenty thousand, five hundred thirty-two".