678440448 has 480 divisors, whose sum is σ = 2502339840. Its totient is φ = 179159040.

The previous prime is 678440447. The next prime is 678440479. The reversal of 678440448 is 844044876.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678440443) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16547308 + ... + 16547348.

It is an arithmetic number, because the mean of its divisors is an integer number (5213208).

Almost surely, 2^678440448 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 678440448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1251169920).

678440448 is an abundant number, since it is smaller than the sum of its proper divisors (1823899392).

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

678440448 is an equidigital number, since it uses as much as digits as its factorization.

678440448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100 (or 72 counting only the distinct ones).

The product of its (nonzero) digits is 688128, while the sum is 45.

The square root of 678440448 is about 26046.8894112138. The cubic root of 678440448 is about 878.6931566527.

The spelling of 678440448 in words is "six hundred seventy-eight million, four hundred forty thousand, four hundred forty-eight".