678584 has 16 divisors (see below), whose sum is σ = 1281120. Its totient is φ = 336960.

The previous prime is 678581. The next prime is 678593. The reversal of 678584 is 485876.

678584 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678581) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2012 + ... + 2324.

It is an arithmetic number, because the mean of its divisors is an integer number (80070).

2⁶⁷⁸⁵⁸⁴ is an apocalyptic number.

It is an amenable number.

678584 is a deficient number, since it is larger than the sum of its proper divisors (602536).

678584 is a wasteful number, since it uses less digits than its factorization.

678584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 590 (or 586 counting only the distinct ones).

The product of its digits is 53760, while the sum is 38.

The square root of 678584 is about 823.7621015803. The cubic root of 678584 is about 87.8755126850.

It can be divided in two parts, 67 and 8584, that multiplied together give a triangular number (575128 = T₁₀₇₂).

The spelling of 678584 in words is "six hundred seventy-eight thousand, five hundred eighty-four".