678828 has 12 divisors (see below), whose sum is σ = 1583960. Its totient is φ = 226272.

The previous prime is 678823. The next prime is 678829. The reversal of 678828 is 828876.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (678823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28273 + ... + 28296.

2⁶⁷⁸⁸²⁸ is an apocalyptic number.

It is an amenable number.

678828 is an abundant number, since it is smaller than the sum of its proper divisors (905132).

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

678828 is a wasteful number, since it uses less digits than its factorization.

678828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56576 (or 56574 counting only the distinct ones).

The product of its digits is 43008, while the sum is 39.

The square root of 678828 is about 823.9101892804. The cubic root of 678828 is about 87.8860439558.

The spelling of 678828 in words is "six hundred seventy-eight thousand, eight hundred twenty-eight".