678323648 has 56 divisors (see below), whose sum is σ = 1396471680. Its totient is φ = 326568960.

The previous prime is 678323641. The next prime is 678323651. The reversal of 678323648 is 846323876.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678323641) 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 7 ways as a sum of consecutive naturals, for example, 453590 + ... + 455082.

Almost surely, 2^678323648 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 678323648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (698235840).

678323648 is an abundant number, since it is smaller than the sum of its proper divisors (718148032).

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

678323648 is a wasteful number, since it uses less digits than its factorization.

678323648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1765 (or 1755 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 47.

The square root of 678323648 is about 26044.6472043681. The cubic root of 678323648 is about 878.6427286202.

The spelling of 678323648 in words is "six hundred seventy-eight million, three hundred twenty-three thousand, six hundred forty-eight".