1044013440 has 128 divisors (see below), whose sum is σ = 3370406400. Its totient is φ = 274839552.

The previous prime is 1044013433. The next prime is 1044013457. The reversal of 1044013440 is 443104401.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148239 + ... + 155121.

It is an arithmetic number, because the mean of its divisors is an integer number (26331300).

Almost surely, 2^1044013440 is an apocalyptic number.

1044013440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1044013440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1685203200).

1044013440 is an abundant number, since it is smaller than the sum of its proper divisors (2326392960).

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

1044013440 is an equidigital number, since it uses as much as digits as its factorization.

1044013440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6984 (or 6972 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 1044013440 is about 32311.1968209164. The cubic root of 1044013440 is about 1014.4610176023.

Adding to 1044013440 its reverse (443104401), we get a palindrome (1487117841).

The spelling of 1044013440 in words is "one billion, forty-four million, thirteen thousand, four hundred forty".