878684 has 12 divisors (see below), whose sum is σ = 1552824. Its totient is φ = 435024.

The previous prime is 878681. The next prime is 878699. The reversal of 878684 is 486878.

It is a happy number.

878684 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 an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 878684.

It is not an unprimeable number, because it can be changed into a prime (878681) 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, 599 + ... + 1454.

It is an arithmetic number, because the mean of its divisors is an integer number (129402).

2⁸⁷⁸⁶⁸⁴ is an apocalyptic number.

It is an amenable number.

878684 is a deficient number, since it is larger than the sum of its proper divisors (674140).

878684 is a wasteful number, since it uses less digits than its factorization.

878684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2164 (or 2162 counting only the distinct ones).

The product of its digits is 86016, while the sum is 41.

The square root of 878684 is about 937.3814591723. The cubic root of 878684 is about 95.7806043053.

The spelling of 878684 in words is "eight hundred seventy-eight thousand, six hundred eighty-four".