6780740 has 24 divisors (see below), whose sum is σ = 14320152. Its totient is φ = 2696960.

The previous prime is 6780707. The next prime is 6780743. The reversal of 6780740 is 470876.

It can be written as a sum of positive squares in 4 ways, for example, as 3268864 + 3511876 = 1808^2 + 1874^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6780697 and 6780706.

It is not an unprimeable number, because it can be changed into a prime (6780743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3080 + ... + 4800.

It is an arithmetic number, because the mean of its divisors is an integer number (596673).

Almost surely, 2^6780740 is an apocalyptic number.

It is an amenable number.

6780740 is an abundant number, since it is smaller than the sum of its proper divisors (7539412).

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

6780740 is a wasteful number, since it uses less digits than its factorization.

6780740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1927 (or 1925 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 6780740 is about 2603.9854070252. The cubic root of 6780740 is about 189.2746117681.

The spelling of 6780740 in words is "six million, seven hundred eighty thousand, seven hundred forty".