678506 has 16 divisors (see below), whose sum is σ = 1071144. Its totient is φ = 321984.

The previous prime is 678499. The next prime is 678533. The reversal of 678506 is 605876.

678506 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 654481 + 24025 = 809^2 + 155^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3836 + ... + 4008.

2⁶⁷⁸⁵⁰⁶ is an apocalyptic number.

678506 is a deficient number, since it is larger than the sum of its proper divisors (392638).

678506 is a wasteful number, since it uses less digits than its factorization.

678506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265.

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

The square root of 678506 is about 823.7147564540. The cubic root of 678506 is about 87.8721455987.

The spelling of 678506 in words is "six hundred seventy-eight thousand, five hundred six".