878220 has 144 divisors (see below), whose sum is σ = 3302208. Its totient is φ = 184320.

The previous prime is 878201. The next prime is 878221. The reversal of 878220 is 22878.

878220 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 (878221) by changing a digit.

878220 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 47 ways as a sum of consecutive naturals, for example, 21400 + ... + 21440.

It is an arithmetic number, because the mean of its divisors is an integer number (22932).

2⁸⁷⁸²²⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 878220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1651104).

878220 is an abundant number, since it is smaller than the sum of its proper divisors (2423988).

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

878220 is a wasteful number, since it uses less digits than its factorization.

878220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80 (or 75 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 878220 is about 937.1339285289. The cubic root of 878220 is about 95.7637419576.

The spelling of 878220 in words is "eight hundred seventy-eight thousand, two hundred twenty".