678528812 has 12 divisors (see below), whose sum is σ = 1278765936. Its totient is φ = 313167120.

The previous prime is 678528811. The next prime is 678528833. The reversal of 678528812 is 218825876.

It is not an unprimeable number, because it can be changed into a prime (678528811) 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, 6524264 + ... + 6524367.

It is an arithmetic number, because the mean of its divisors is an integer number (106563828).

Almost surely, 2^678528812 is an apocalyptic number.

It is an amenable number.

678528812 is a deficient number, since it is larger than the sum of its proper divisors (600237124).

678528812 is a wasteful number, since it uses less digits than its factorization.

678528812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13048648 (or 13048646 counting only the distinct ones).

The product of its digits is 430080, while the sum is 47.

The square root of 678528812 is about 26048.5856045967. The cubic root of 678528812 is about 878.7313036861.

The spelling of 678528812 in words is "six hundred seventy-eight million, five hundred twenty-eight thousand, eight hundred twelve".