678056 has 16 divisors (see below), whose sum is σ = 1283040. Its totient is φ = 335920.

The previous prime is 678047. The next prime is 678061. The reversal of 678056 is 650876.

It is an unprimeable number.

678056 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 3 ways as a sum of consecutive naturals, for example, 725 + ... + 1371.

It is an arithmetic number, because the mean of its divisors is an integer number (80190).

2⁶⁷⁸⁰⁵⁶ is an apocalyptic number.

It is an amenable number.

678056 is a deficient number, since it is larger than the sum of its proper divisors (604984).

678056 is a wasteful number, since it uses less digits than its factorization.

678056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 784 (or 780 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 678056 is about 823.4415583391. The cubic root of 678056 is about 87.8527150603.

The spelling of 678056 in words is "six hundred seventy-eight thousand, fifty-six".