1144273728 has 112 divisors (see below), whose sum is σ = 3272088960. Its totient is φ = 350828544.

The previous prime is 1144273721. The next prime is 1144273747. The reversal of 1144273728 is 8273724411.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1144273721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 895426 + ... + 896702.

It is an arithmetic number, because the mean of its divisors is an integer number (29215080).

Almost surely, 2^1144273728 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 1144273728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1636044480).

1144273728 is an abundant number, since it is smaller than the sum of its proper divisors (2127815232).

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

1144273728 is a wasteful number, since it uses less digits than its factorization.

1144273728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1664 (or 1654 counting only the distinct ones).

The product of its digits is 75264, while the sum is 39.

The square root of 1144273728 is about 33827.1152775403. The cubic root of 1144273728 is about 1045.9477153007.

The spelling of 1144273728 in words is "one billion, one hundred forty-four million, two hundred seventy-three thousand, seven hundred twenty-eight".