1440441020 has 24 divisors (see below), whose sum is σ = 3129235200. Its totient is φ = 556308032.

The previous prime is 1440441019. The next prime is 1440441029. The reversal of 1440441020 is 201440441.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 1440440983 and 1440441001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440441029) 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, 1241180 + ... + 1242339.

It is an arithmetic number, because the mean of its divisors is an integer number (130384800).

Almost surely, 2^1440441020 is an apocalyptic number.

1440441020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1440441020 is an abundant number, since it is smaller than the sum of its proper divisors (1688794180).

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

1440441020 is a wasteful number, since it uses less digits than its factorization.

1440441020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2483557 (or 2483555 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 1440441020 is about 37953.1424258914. The cubic root of 1440441020 is about 1129.3585050318.

Adding to 1440441020 its reverse (201440441), we get a palindrome (1641881461).

The spelling of 1440441020 in words is "one billion, four hundred forty million, four hundred forty-one thousand, twenty".