678128 has 20 divisors (see below), whose sum is σ = 1433688. Its totient is φ = 308160.

The previous prime is 678103. The next prime is 678133. The reversal of 678128 is 821876.

It is a junction number, because it is equal to n+sod(n) for n = 678094 and 678103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1751 + ... + 2102.

2⁶⁷⁸¹²⁸ is an apocalyptic number.

It is an amenable number.

678128 is an abundant number, since it is smaller than the sum of its proper divisors (755560).

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

678128 is a wasteful number, since it uses less digits than its factorization.

678128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3872 (or 3866 counting only the distinct ones).

The product of its digits is 5376, while the sum is 32.

The square root of 678128 is about 823.4852761282. The cubic root of 678128 is about 87.8558245241.

The spelling of 678128 in words is "six hundred seventy-eight thousand, one hundred twenty-eight".