2001441440 has 24 divisors (see below), whose sum is σ = 4728405780. Its totient is φ = 800576512.

The previous prime is 2001441419. The next prime is 2001441443. The reversal of 2001441440 is 441441002.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1798777744 + 202663696 = 42412^2 + 14236^2 .

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

It is not an unprimeable number, because it can be changed into a prime (2001441443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6254345 + ... + 6254664.

Almost surely, 2^2001441440 is an apocalyptic number.

2001441440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001441440 is an abundant number, since it is smaller than the sum of its proper divisors (2726964340).

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

2001441440 is a wasteful number, since it uses less digits than its factorization.

2001441440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12509024 (or 12509016 counting only the distinct ones).

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

The square root of 2001441440 is about 44737.4724364263. The cubic root of 2001441440 is about 1260.2236606403.

Adding to 2001441440 its reverse (441441002), we get a palindrome (2442882442).

The spelling of 2001441440 in words is "two billion, one million, four hundred forty-one thousand, four hundred forty".