859860 has 72 divisors (see below), whose sum is σ = 2771496. Its totient is φ = 215040.

The previous prime is 859853. The next prime is 859861. The reversal of 859860 is 68958.

859860 is a `hidden beast` number, since 8 + 598 + 60 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 242064 + 617796 = 492^2 + 786^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (859861) by changing a digit.

859860 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2920 + ... + 3200.

It is an arithmetic number, because the mean of its divisors is an integer number (38493).

2⁸⁵⁹⁸⁶⁰ 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 859860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1385748).

859860 is an abundant number, since it is smaller than the sum of its proper divisors (1911636).

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

859860 is a wasteful number, since it uses less digits than its factorization.

859860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313 (or 308 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 859860 is about 927.2863635361. The cubic root of 859860 is about 95.0916935561.

The spelling of 859860 in words is "eight hundred fifty-nine thousand, eight hundred sixty".