6507840 has 56 divisors (see below), whose sum is σ = 20665440. Its totient is φ = 1735168.

The previous prime is 6507833. The next prime is 6507859. The reversal of 6507840 is 487056.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 6507798 and 6507807.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2430 + ... + 4349.

Almost surely, 2^6507840 is an apocalyptic number.

6507840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6507840 is an abundant number, since it is smaller than the sum of its proper divisors (14157600).

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

6507840 is a wasteful number, since it uses less digits than its factorization.

6507840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6799 (or 6789 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 6507840 is about 2551.0468439447. The cubic root of 6507840 is about 186.7005607387.

The spelling of 6507840 in words is "six million, five hundred seven thousand, eight hundred forty".