6530040 has 192 divisors, whose sum is σ = 24766560. Its totient is φ = 1474560.

The previous prime is 6530011. The next prime is 6530047. The reversal of 6530040 is 400356.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 6529995 and 6530022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6530047) 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 47 ways as a sum of consecutive naturals, for example, 67272 + ... + 67368.

Almost surely, 2^6530040 is an apocalyptic number.

6530040 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 6530040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12383280).

6530040 is an abundant number, since it is smaller than the sum of its proper divisors (18236520).

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

6530040 is a wasteful number, since it uses less digits than its factorization.

6530040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142 (or 135 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 6530040 is about 2555.3942944289. The cubic root of 6530040 is about 186.9126151430.

Adding to 6530040 its reverse (400356), we get a palindrome (6930396).

The spelling of 6530040 in words is "six million, five hundred thirty thousand, forty".