6864778 has 8 divisors (see below), whose sum is σ = 10536768. Its totient is φ = 3352524.

The previous prime is 6864769. The next prime is 6864779. The reversal of 6864778 is 8774686.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (6864779) 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 3 ways as a sum of consecutive naturals, for example, 39826 + ... + 39997.

It is an arithmetic number, because the mean of its divisors is an integer number (1317096).

Almost surely, 2^6864778 is an apocalyptic number.

6864778 is a deficient number, since it is larger than the sum of its proper divisors (3671990).

6864778 is a wasteful number, since it uses less digits than its factorization.

6864778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79868.

The product of its digits is 451584, while the sum is 46.

The square root of 6864778 is about 2620.0721364115. The cubic root of 6864778 is about 190.0533368264.

It can be divided in two parts, 68 and 64778, that added together give a palindrome (64846).

The spelling of 6864778 in words is "six million, eight hundred sixty-four thousand, seven hundred seventy-eight".