6443040 has 96 divisors (see below), whose sum is σ = 20998656. Its totient is φ = 1658880.

The previous prime is 6443011. The next prime is 6443081. The reversal of 6443040 is 403446.

It is a tau number, because it is divible by the number of its divisors (96).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 6442998 and 6443016.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14664 + ... + 15096.

It is an arithmetic number, because the mean of its divisors is an integer number (218736).

Almost surely, 2^6443040 is an apocalyptic number.

6443040 is a gapful number since it is divisible by the number (60) 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 6443040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10499328).

6443040 is an abundant number, since it is smaller than the sum of its proper divisors (14555616).

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

6443040 is a wasteful number, since it uses less digits than its factorization.

6443040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482 (or 474 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 6443040 is about 2538.3144013301. The cubic root of 6443040 is about 186.0788196411.

Adding to 6443040 its reverse (403446), we get a palindrome (6846486).

The spelling of 6443040 in words is "six million, four hundred forty-three thousand, forty".