6785440 has 24 divisors (see below), whose sum is σ = 16030980. Its totient is φ = 2714112.

The previous prime is 6785419. The next prime is 6785447. The reversal of 6785440 is 445876.

It can be written as a sum of positive squares in 2 ways, for example, as 6780816 + 4624 = 2604^2 + 68^2 .

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 6785396 and 6785405.

It is not an unprimeable number, because it can be changed into a prime (6785447) 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, 21045 + ... + 21364.

Almost surely, 2^6785440 is an apocalyptic number.

It is an amenable number.

6785440 is an abundant number, since it is smaller than the sum of its proper divisors (9245540).

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

6785440 is a wasteful number, since it uses less digits than its factorization.

6785440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42424 (or 42416 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 6785440 is about 2604.8877135109. The cubic root of 6785440 is about 189.3183329164.

It can be divided in two parts, 6785 and 440, that added together give a square (7225 = 85²).

The spelling of 6785440 in words is "six million, seven hundred eighty-five thousand, four hundred forty".