678880 has 24 divisors (see below), whose sum is σ = 1604232. Its totient is φ = 271488.

The previous prime is 678871. The next prime is 678883. The reversal of 678880 is 88876.

678880 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1962 + ... + 2281.

It is an arithmetic number, because the mean of its divisors is an integer number (66843).

2⁶⁷⁸⁸⁸⁰ is an apocalyptic number.

It is an amenable number.

678880 is an abundant number, since it is smaller than the sum of its proper divisors (925352).

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

678880 is a wasteful number, since it uses less digits than its factorization.

678880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4258 (or 4250 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 678880 is about 823.9417455136. The cubic root of 678880 is about 87.8882879988. Note that the first 3 decimals are identical.

The spelling of 678880 in words is "six hundred seventy-eight thousand, eight hundred eighty".