6540580 has 24 divisors (see below), whose sum is σ = 14543928. Its totient is φ = 2462208.

The previous prime is 6540557. The next prime is 6540587. The reversal of 6540580 is 850456.

It can be written as a sum of positive squares in 4 ways, for example, as 419904 + 6120676 = 648^2 + 2474^2 .

It is not an unprimeable number, because it can be changed into a prime (6540587) by changing a digit.

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, 9279 + ... + 9958.

It is an arithmetic number, because the mean of its divisors is an integer number (605997).

Almost surely, 2^6540580 is an apocalyptic number.

It is an amenable number.

6540580 is an abundant number, since it is smaller than the sum of its proper divisors (8003348).

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

6540580 is a wasteful number, since it uses less digits than its factorization.

6540580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19263 (or 19261 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 6540580 is about 2557.4557669684. The cubic root of 6540580 is about 187.0131249903.

The spelling of 6540580 in words is "six million, five hundred forty thousand, five hundred eighty".