678321888 has 216 divisors, whose sum is σ = 2017596168. Its totient is φ = 199355904.

The previous prime is 678321877. The next prime is 678321953. The reversal of 678321888 is 888123876.

678321888 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Its product of digits (1032192) is a multiple of the sum of its prime divisors (84).

It is a self number, because there is not a number n which added to its sum of digits gives 678321888.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 18333006 + ... + 18333042.

It is an arithmetic number, because the mean of its divisors is an integer number (9340723).

Almost surely, 2^678321888 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 678321888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1008798084).

678321888 is an abundant number, since it is smaller than the sum of its proper divisors (1339274280).

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

678321888 is a wasteful number, since it uses less digits than its factorization.

678321888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134 (or 84 counting only the distinct ones).

The product of its digits is 1032192, while the sum is 51.

The square root of 678321888 is about 26044.6134162133. The cubic root of 678321888 is about 878.6419687014.

The spelling of 678321888 in words is "six hundred seventy-eight million, three hundred twenty-one thousand, eight hundred eighty-eight".