1044440540 has 72 divisors (see below), whose sum is σ = 2596372800. Its totient is φ = 350570880.

The previous prime is 1044440531. The next prime is 1044440549. The reversal of 1044440540 is 450444401.

It is an interprime number because it is at equal distance from previous prime (1044440531) and next prime (1044440549).

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1044440549) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14861 + ... + 48059.

Almost surely, 2^1044440540 is an apocalyptic number.

1044440540 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 1044440540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1298186400).

1044440540 is an abundant number, since it is smaller than the sum of its proper divisors (1551932260).

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

1044440540 is a wasteful number, since it uses less digits than its factorization.

1044440540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33243 (or 33230 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 26.

The square root of 1044440540 is about 32317.8053091481. The cubic root of 1044440540 is about 1014.5993354993.

Adding to 1044440540 its reverse (450444401), we get a palindrome (1494884941).

The spelling of 1044440540 in words is "one billion, forty-four million, four hundred forty thousand, five hundred forty".