9855860 has 72 divisors (see below), whose sum is σ = 24562440. Its totient is φ = 3311616.

The previous prime is 9855823. The next prime is 9855863. The reversal of 9855860 is 685589.

9855860 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 283024 + 9572836 = 532^2 + 3094^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9855863) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87164 + ... + 87276.

It is an arithmetic number, because the mean of its divisors is an integer number (341145).

Almost surely, 2^9855860 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 9855860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12281220).

9855860 is an abundant number, since it is smaller than the sum of its proper divisors (14706580).

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

9855860 is a wasteful number, since it uses less digits than its factorization.

9855860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225 (or 216 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 41.

The square root of 9855860 is about 3139.4044021120. The cubic root of 9855860 is about 214.4033212618.

The spelling of 9855860 in words is "nine million, eight hundred fifty-five thousand, eight hundred sixty".