678912 has 88 divisors (see below), whose sum is σ = 2063376. Its totient is φ = 196608.

The previous prime is 678907. The next prime is 678941. The reversal of 678912 is 219876.

It is a congruent number.

It is an unprimeable number.

678912 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39928 + ... + 39944.

2⁶⁷⁸⁹¹² 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 678912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1031688).

678912 is an abundant number, since it is smaller than the sum of its proper divisors (1384464).

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

678912 is a wasteful number, since it uses less digits than its factorization.

678912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53 (or 35 counting only the distinct ones).

The product of its digits is 6048, while the sum is 33.

The square root of 678912 is about 823.9611641334. The cubic root of 678912 is about 87.8896688913.

The spelling of 678912 in words is "six hundred seventy-eight thousand, nine hundred twelve".