1144144240 has 20 divisors (see below), whose sum is σ = 2660135544. Its totient is φ = 457657664.

The previous prime is 1144144219. The next prime is 1144144247. The reversal of 1144144240 is 424414411.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1144144247) 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, 7150822 + ... + 7150981.

Almost surely, 2^1144144240 is an apocalyptic number.

1144144240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1144144240 is an abundant number, since it is smaller than the sum of its proper divisors (1515991304).

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

1144144240 is a wasteful number, since it uses less digits than its factorization.

1144144240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14301816 (or 14301810 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 25.

The square root of 1144144240 is about 33825.2012558684. The cubic root of 1144144240 is about 1045.9082600598.

Adding to 1144144240 its reverse (424414411), we get a palindrome (1568558651).

The spelling of 1144144240 in words is "one billion, one hundred forty-four million, one hundred forty-four thousand, two hundred forty".