6423040 has 80 divisors (see below), whose sum is σ = 16670808. Its totient is φ = 2359296.

The previous prime is 6423029. The next prime is 6423047. The reversal of 6423040 is 403246.

It can be written as a sum of positive squares in 4 ways, for example, as 3154176 + 3268864 = 1776^2 + 1808^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 6422999 and 6423017.

It is not an unprimeable number, because it can be changed into a prime (6423047) 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, 33184 + ... + 33376.

Almost surely, 2^6423040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6423040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8335404).

6423040 is an abundant number, since it is smaller than the sum of its proper divisors (10247768).

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

6423040 is a wasteful number, since it uses less digits than its factorization.

6423040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229 (or 213 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 6423040 is about 2534.3717170139. The cubic root of 6423040 is about 185.8860827864.

Adding to 6423040 its reverse (403246), we get a palindrome (6826286).

It can be divided in two parts, 64 and 23040, that added together give a square (23104 = 152²).

The spelling of 6423040 in words is "six million, four hundred twenty-three thousand, forty".