6540388 has 12 divisors (see below), whose sum is σ = 11515392. Its totient is φ = 3250280.

The previous prime is 6540383. The next prime is 6540407. The reversal of 6540388 is 8830456.

It is not an unprimeable number, because it can be changed into a prime (6540383) 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 3 ways as a sum of consecutive naturals, for example, 4228 + ... + 5563.

It is an arithmetic number, because the mean of its divisors is an integer number (959616).

Almost surely, 2^6540388 is an apocalyptic number.

It is an amenable number.

6540388 is a deficient number, since it is larger than the sum of its proper divisors (4975004).

6540388 is a wasteful number, since it uses less digits than its factorization.

6540388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9962 (or 9960 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 6540388 is about 2557.4182293868. The cubic root of 6540388 is about 187.0112950368.

The spelling of 6540388 in words is "six million, five hundred forty thousand, three hundred eighty-eight".