6787840 has 36 divisors (see below), whose sum is σ = 16262064. Its totient is φ = 2714624.

The previous prime is 6787801. The next prime is 6787841. The reversal of 6787840 is 487876.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 6787793 and 6787802.

It is not an unprimeable number, because it can be changed into a prime (6787841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1372 + ... + 3931.

It is an arithmetic number, because the mean of its divisors is an integer number (451724).

Almost surely, 2^6787840 is an apocalyptic number.

It is an amenable number.

6787840 is an abundant number, since it is smaller than the sum of its proper divisors (9474224).

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

6787840 is an equidigital number, since it uses as much as digits as its factorization.

6787840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5324 (or 5310 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 40.

The square root of 6787840 is about 2605.3483452314. The cubic root of 6787840 is about 189.3406508226.

The spelling of 6787840 in words is "six million, seven hundred eighty-seven thousand, eight hundred forty".