878646 has 16 divisors (see below), whose sum is σ = 1833984. Its totient is φ = 280104.

The previous prime is 878641. The next prime is 878651. The reversal of 878646 is 646878.

878646 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (878641) and next prime (878651).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (878641) by changing a digit.

878646 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 7 ways as a sum of consecutive naturals, for example, 3046 + ... + 3321.

It is an arithmetic number, because the mean of its divisors is an integer number (114624).

2⁸⁷⁸⁶⁴⁶ is an apocalyptic number.

878646 is an abundant number, since it is smaller than the sum of its proper divisors (955338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

878646 is a wasteful number, since it uses less digits than its factorization.

878646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6395.

The product of its digits is 64512, while the sum is 39.

The square root of 878646 is about 937.3611897236. The cubic root of 878646 is about 95.7792235604.

The spelling of 878646 in words is "eight hundred seventy-eight thousand, six hundred forty-six".