1440435144 has 64 divisors (see below), whose sum is σ = 3847276800. Its totient is φ = 448075584.

The previous prime is 1440435131. The next prime is 1440435167. The reversal of 1440435144 is 4415340441.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6979 + ... + 54125.

It is an arithmetic number, because the mean of its divisors is an integer number (60113700).

Almost surely, 2^1440435144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1440435144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1923638400).

1440435144 is an abundant number, since it is smaller than the sum of its proper divisors (2406841656).

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

1440435144 is a wasteful number, since it uses less digits than its factorization.

1440435144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47242 (or 47238 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 30.

The square root of 1440435144 is about 37953.0650145677. The cubic root of 1440435144 is about 1129.3569693634.

Adding to 1440435144 its reverse (4415340441), we get a palindrome (5855775585).

The spelling of 1440435144 in words is "one billion, four hundred forty million, four hundred thirty-five thousand, one hundred forty-four".