1144454440 has 32 divisors (see below), whose sum is σ = 2623612680. Its totient is φ = 449143552.

The previous prime is 1144454429. The next prime is 1144454491. The reversal of 1144454440 is 444544411.

It can be written as a sum of positive squares in 4 ways, for example, as 1140683076 + 3771364 = 33774^2 + 1942^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 267799 + ... + 272038.

Almost surely, 2^1144454440 is an apocalyptic number.

1144454440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1144454440 is an abundant number, since it is smaller than the sum of its proper divisors (1479158240).

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

1144454440 is a wasteful number, since it uses less digits than its factorization.

1144454440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539901 (or 539897 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 31.

The square root of 1144454440 is about 33829.7862836879. The cubic root of 1144454440 is about 1046.0027736169.

Adding to 1144454440 its reverse (444544411), we get a palindrome (1588998851).

It can be divided in two parts, 1 and 144454440, that added together give a palindrome (144454441).

The spelling of 1144454440 in words is "one billion, one hundred forty-four million, four hundred fifty-four thousand, four hundred forty".