2144440540 has 24 divisors (see below), whose sum is σ = 4912718832. Its totient is φ = 779796480.

The previous prime is 2144440513. The next prime is 2144440547. The reversal of 2144440540 is 450444412.

It is a junction number, because it is equal to n+sod(n) for n = 2144440499 and 2144440508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2144440547) 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, 4873509 + ... + 4873948.

It is an arithmetic number, because the mean of its divisors is an integer number (204696618).

Almost surely, 2^2144440540 is an apocalyptic number.

2144440540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2144440540 is an abundant number, since it is smaller than the sum of its proper divisors (2768278292).

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

2144440540 is a wasteful number, since it uses less digits than its factorization.

2144440540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9747477 (or 9747475 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 28.

The square root of 2144440540 is about 46308.1044742710. The cubic root of 2144440540 is about 1289.5494570687.

Adding to 2144440540 its reverse (450444412), we get a palindrome (2594884952).

The spelling of 2144440540 in words is "two billion, one hundred forty-four million, four hundred forty thousand, five hundred forty".