678850 has 12 divisors (see below), whose sum is σ = 1262754. Its totient is φ = 271520.

The previous prime is 678833. The next prime is 678859. The reversal of 678850 is 58876.

678850 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 3 ways, for example, as 641601 + 37249 = 801^2 + 193^2 .

It is not an unprimeable number, because it can be changed into a prime (678859) by changing a digit.

678850 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 5 ways as a sum of consecutive naturals, for example, 6739 + ... + 6838.

2⁶⁷⁸⁸⁵⁰ is an apocalyptic number.

678850 is a deficient number, since it is larger than the sum of its proper divisors (583904).

678850 is a wasteful number, since it uses less digits than its factorization.

678850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13589 (or 13584 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 678850 is about 823.9235401419. The cubic root of 678850 is about 87.8869933726.

The spelling of 678850 in words is "six hundred seventy-eight thousand, eight hundred fifty".