6781968 has 50 divisors (see below), whose sum is σ = 19632734. Its totient is φ = 2260224.

The previous prime is 6781967. The next prime is 6782021. The reversal of 6781968 is 8691876.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 6718464 + 63504 = 2592^2 + 252^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (6781961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1321 + ... + 3912.

Almost surely, 2^6781968 is an apocalyptic number.

It is an amenable number.

6781968 is an abundant number, since it is smaller than the sum of its proper divisors (12850766).

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

6781968 is a wasteful number, since it uses less digits than its factorization.

6781968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5253 (or 5238 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 6781968 is about 2604.2211887626. The cubic root of 6781968 is about 189.2860370301.

The spelling of 6781968 in words is "six million, seven hundred eighty-one thousand, nine hundred sixty-eight".