678484868 has 6 divisors (see below), whose sum is σ = 1187348526. Its totient is φ = 339242432.

The previous prime is 678484867. The next prime is 678484901. The reversal of 678484868 is 868484876.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 656281924 + 22202944 = 25618^2 + 4712^2 .

It is a super-2 number, since 2×678484868² = 920683432209954848, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (678484867) 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 as a sum of consecutive naturals, namely, 84810605 + ... + 84810612.

It is an arithmetic number, because the mean of its divisors is an integer number (197891421).

Almost surely, 2^678484868 is an apocalyptic number.

It is an amenable number.

678484868 is a deficient number, since it is larger than the sum of its proper divisors (508863658).

678484868 is a wasteful number, since it uses less digits than its factorization.

678484868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169621221 (or 169621219 counting only the distinct ones).

The product of its digits is 16515072, while the sum is 59.

The square root of 678484868 is about 26047.7420902465. The cubic root of 678484868 is about 878.7123333288.

The spelling of 678484868 in words is "six hundred seventy-eight million, four hundred eighty-four thousand, eight hundred sixty-eight".