1040043440000 has 160 divisors (see below), whose sum is σ = 2701698492240. Its totient is φ = 397928960000.

The previous prime is 1040043439979. The next prime is 1040043440027. The reversal of 1040043440000 is 443400401.

It is a tau number, because it is divible by the number of its divisors (160).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1557380 + ... + 2122620.

Almost surely, 2^{1040043440000} is an apocalyptic number.

1040043440000 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 1040043440000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1350849246120).

1040043440000 is an abundant number, since it is smaller than the sum of its proper divisors (1661655052240).

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

1040043440000 is an frugal number, since it uses more digits than its factorization.

1040043440000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565298 (or 565271 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 1040043440000 its reverse (443400401), we get a palindrome (1040486840401).

The spelling of 1040043440000 in words is "one trillion, forty billion, forty-three million, four hundred forty thousand".