1440841728 has 64 divisors (see below), whose sum is σ = 3842448120. Its totient is φ = 480247808.

The previous prime is 1440841711. The next prime is 1440841733. The reversal of 1440841728 is 8271480441.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-3 number, since 3×1440841728³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90976 + ... + 105632.

Almost surely, 2^1440841728 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 1440841728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1921224060).

1440841728 is an abundant number, since it is smaller than the sum of its proper divisors (2401606392).

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

1440841728 is an frugal number, since it uses more digits than its factorization.

1440841728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14690 (or 14662 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 39.

The square root of 1440841728 is about 37958.4210419770. The cubic root of 1440841728 is about 1129.4632185709.

The spelling of 1440841728 in words is "one billion, four hundred forty million, eight hundred forty-one thousand, seven hundred twenty-eight".