859878 has 48 divisors (see below), whose sum is σ = 2036736. Its totient is φ = 261360.

The previous prime is 859861. The next prime is 859891. The reversal of 859878 is 878958.

Its product of digits (161280) is a multiple of the sum of its prime divisors (126).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12801 + ... + 12867.

It is an arithmetic number, because the mean of its divisors is an integer number (42432).

2⁸⁵⁹⁸⁷⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 859878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1018368).

859878 is an abundant number, since it is smaller than the sum of its proper divisors (1176858).

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

859878 is a wasteful number, since it uses less digits than its factorization.

859878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129 (or 126 counting only the distinct ones).

The product of its digits is 161280, while the sum is 45.

The square root of 859878 is about 927.2960692249. The cubic root of 859878 is about 95.0923570899.

The spelling of 859878 in words is "eight hundred fifty-nine thousand, eight hundred seventy-eight".