678808320 has 144 divisors (see below), whose sum is σ = 2218900992. Its totient is φ = 176762880.

The previous prime is 678808313. The next prime is 678808331. The reversal of 678808320 is 23808876.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 163065 + ... + 167175.

Almost surely, 2^678808320 is an apocalyptic number.

678808320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 678808320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1109450496).

678808320 is an abundant number, since it is smaller than the sum of its proper divisors (1540092672).

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

678808320 is a wasteful number, since it uses less digits than its factorization.

678808320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4178 (or 4164 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 678808320 is about 26053.9501803469. The cubic root of 678808320 is about 878.8519464195.

The spelling of 678808320 in words is "six hundred seventy-eight million, eight hundred eight thousand, three hundred twenty".