6500240 has 40 divisors (see below), whose sum is σ = 15227448. Its totient is φ = 2580480.

The previous prime is 6500233. The next prime is 6500243. The reversal of 6500240 is 420056.

It can be written as a sum of positive squares in 4 ways, for example, as 190096 + 6310144 = 436^2 + 2512^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6500243) 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, 15230 + ... + 15650.

Almost surely, 2^6500240 is an apocalyptic number.

It is an amenable number.

6500240 is an abundant number, since it is smaller than the sum of its proper divisors (8727208).

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

6500240 is a wasteful number, since it uses less digits than its factorization.

6500240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627 (or 621 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 6500240 is about 2549.5568242344. The cubic root of 6500240 is about 186.6278547425.

Adding to 6500240 its reverse (420056), we get a palindrome (6920296).

The spelling of 6500240 in words is "six million, five hundred thousand, two hundred forty".