6809778 has 16 divisors (see below), whose sum is σ = 15132960. Its totient is φ = 2269908.

The previous prime is 6809767. The next prime is 6809779. The reversal of 6809778 is 8779086.

It is not an unprimeable number, because it can be changed into a prime (6809779) 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, 63000 + ... + 63107.

It is an arithmetic number, because the mean of its divisors is an integer number (945810).

Almost surely, 2^6809778 is an apocalyptic number.

6809778 is an abundant number, since it is smaller than the sum of its proper divisors (8323182).

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

6809778 is a wasteful number, since it uses less digits than its factorization.

6809778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126118 (or 126112 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 45.

The square root of 6809778 is about 2609.5551345009. Note that the first 3 decimals coincide. The cubic root of 6809778 is about 189.5444116801.

The spelling of 6809778 in words is "six million, eight hundred nine thousand, seven hundred seventy-eight".