6240040 has 32 divisors (see below), whose sum is σ = 14239080. Its totient is φ = 2460672.

The previous prime is 6240019. The next prime is 6240041. The reversal of 6240040 is 400426.

It can be written as a sum of positive squares in 4 ways, for example, as 3556996 + 2683044 = 1886^2 + 1638^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6239996 and 6240023.

It is not an unprimeable number, because it can be changed into a prime (6240041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1852 + ... + 3988.

Almost surely, 2^6240040 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 6240040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7119540).

6240040 is an abundant number, since it is smaller than the sum of its proper divisors (7999040).

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

6240040 is a wasteful number, since it uses less digits than its factorization.

6240040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2221 (or 2217 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 6240040 is about 2498.0072057542. The cubic root of 6240040 is about 184.1036750326.

Adding to 6240040 its reverse (400426), we get a palindrome (6640466).

The spelling of 6240040 in words is "six million, two hundred forty thousand, forty".