878660 has 12 divisors (see below), whose sum is σ = 1845228. Its totient is φ = 351456.

The previous prime is 878659. The next prime is 878663. The reversal of 878660 is 66878.

It can be written as a sum of positive squares in 2 ways, for example, as 145924 + 732736 = 382^2 + 856^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 878660.

It is not an unprimeable number, because it can be changed into a prime (878663) 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, 21947 + ... + 21986.

It is an arithmetic number, because the mean of its divisors is an integer number (153769).

2⁸⁷⁸⁶⁶⁰ is an apocalyptic number.

It is an amenable number.

878660 is an abundant number, since it is smaller than the sum of its proper divisors (966568).

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

878660 is a wasteful number, since it uses less digits than its factorization.

878660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43942 (or 43940 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 878660 is about 937.3686574662. The cubic root of 878660 is about 95.7797322605.

The spelling of 878660 in words is "eight hundred seventy-eight thousand, six hundred sixty".