678832656 has 80 divisors (see below), whose sum is σ = 1799884800. Its totient is φ = 220361344.

The previous prime is 678832607. The next prime is 678832657. The reversal of 678832656 is 656238876.

It is a junction number, because it is equal to n+sod(n) for n = 678832599 and 678832608.

It is not an unprimeable number, because it can be changed into a prime (678832657) 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 15 ways as a sum of consecutive naturals, for example, 538555 + ... + 539813.

It is an arithmetic number, because the mean of its divisors is an integer number (22498560).

Almost surely, 2^678832656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 678832656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (899942400).

678832656 is an abundant number, since it is smaller than the sum of its proper divisors (1121052144).

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

678832656 is a wasteful number, since it uses less digits than its factorization.

678832656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1556 (or 1550 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 51.

The square root of 678832656 is about 26054.4172070687. The cubic root of 678832656 is about 878.8624488862.

The spelling of 678832656 in words is "six hundred seventy-eight million, eight hundred thirty-two thousand, six hundred fifty-six".