6778128 has 40 divisors (see below), whose sum is σ = 20012608. Its totient is φ = 1936512.

The previous prime is 6778127. The next prime is 6778147. The reversal of 6778128 is 8218776.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (6778127) 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 7 ways as a sum of consecutive naturals, for example, 9751 + ... + 10422.

Almost surely, 2^6778128 is an apocalyptic number.

It is an amenable number.

6778128 is an abundant number, since it is smaller than the sum of its proper divisors (13234480).

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

6778128 is a wasteful number, since it uses less digits than its factorization.

6778128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20191 (or 20185 counting only the distinct ones).

The product of its digits is 37632, while the sum is 39.

The square root of 6778128 is about 2603.4838198076. The cubic root of 6778128 is about 189.2503052381.

The spelling of 6778128 in words is "six million, seven hundred seventy-eight thousand, one hundred twenty-eight".