6530840 has 32 divisors (see below), whose sum is σ = 15040080. Its totient is φ = 2550912.

The previous prime is 6530831. The next prime is 6530861. The reversal of 6530840 is 480356.

It is a super-2 number, since 2×6530840² = 85303742211200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179 + ... + 3618.

Almost surely, 2^6530840 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 6530840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7520040).

6530840 is an abundant number, since it is smaller than the sum of its proper divisors (8509240).

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

6530840 is a wasteful number, since it uses less digits than its factorization.

6530840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3851 (or 3847 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 6530840 is about 2555.5508212517. The cubic root of 6530840 is about 186.9202477653.

The spelling of 6530840 in words is "six million, five hundred thirty thousand, eight hundred forty".