1440133424 has 40 divisors (see below), whose sum is σ = 2948702640. Its totient is φ = 679477248.

The previous prime is 1440133403. The next prime is 1440133459. The reversal of 1440133424 is 4243310441.

It is a junction number, because it is equal to n+sod(n) for n = 1440133393 and 1440133402.

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, 68912 + ... + 87344.

It is an arithmetic number, because the mean of its divisors is an integer number (73717566).

Almost surely, 2^1440133424 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 1440133424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1474351320).

1440133424 is an abundant number, since it is smaller than the sum of its proper divisors (1508569216).

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

1440133424 is a wasteful number, since it uses less digits than its factorization.

1440133424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18717 (or 18711 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 1440133424 is about 37949.0898968605. The cubic root of 1440133424 is about 1129.2781104665.

Adding to 1440133424 its reverse (4243310441), we get a palindrome (5683443865).

The spelling of 1440133424 in words is "one billion, four hundred forty million, one hundred thirty-three thousand, four hundred twenty-four".