8043440 has 40 divisors (see below), whose sum is σ = 19351440. Its totient is φ = 3105536.

The previous prime is 8043433. The next prime is 8043449. The reversal of 8043440 is 443408.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8043449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 587 + ... + 4053.

It is an arithmetic number, because the mean of its divisors is an integer number (483786).

Almost surely, 2^8043440 is an apocalyptic number.

8043440 is a gapful number since it is divisible by the number (80) 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 8043440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9675720).

8043440 is an abundant number, since it is smaller than the sum of its proper divisors (11308000).

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

8043440 is a wasteful number, since it uses less digits than its factorization.

8043440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3509 (or 3503 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 8043440 is about 2836.0959081103. The cubic root of 8043440 is about 200.3613467495.

Adding to 8043440 its reverse (443408), we get a palindrome (8486848).

The spelling of 8043440 in words is "eight million, forty-three thousand, four hundred forty".