678896 has 20 divisors (see below), whose sum is σ = 1328784. Its totient is φ = 336000.

The previous prime is 678883. The next prime is 678901. The reversal of 678896 is 698876.

It is a congruent number.

It is an unprimeable number.

678896 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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, 2276 + ... + 2556.

2⁶⁷⁸⁸⁹⁶ is an apocalyptic number.

It is an amenable number.

678896 is a deficient number, since it is larger than the sum of its proper divisors (649888).

678896 is a wasteful number, since it uses less digits than its factorization.

678896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440 (or 434 counting only the distinct ones).

The product of its digits is 145152, while the sum is 44.

The square root of 678896 is about 823.9514548807. The cubic root of 678896 is about 87.8889784505. Note that the first 3 decimals are identical.

The spelling of 678896 in words is "six hundred seventy-eight thousand, eight hundred ninety-six".