6780744 has 48 divisors (see below), whose sum is σ = 18820620. Its totient is φ = 2204160.

The previous prime is 6780743. The next prime is 6780757. The reversal of 6780744 is 4470876.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6200100 + 580644 = 2490^2 + 762^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 6780699 and 6780708.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 1804 + ... + 4100.

Almost surely, 2^6780744 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6780744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9410310).

6780744 is an abundant number, since it is smaller than the sum of its proper divisors (12039876).

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

6780744 is a wasteful number, since it uses less digits than its factorization.

6780744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2350 (or 2343 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 6780744 is about 2603.9861750785. The cubic root of 6780744 is about 189.2746489861.

The spelling of 6780744 in words is "six million, seven hundred eighty thousand, seven hundred forty-four".