860821860 has 96 divisors (see below), whose sum is σ = 2561328000. Its totient is φ = 215267328.

The previous prime is 860821853. The next prime is 860821879. The reversal of 860821860 is 68128068.

860821860 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 311766 + ... + 314514.

It is an arithmetic number, because the mean of its divisors is an integer number (26680500).

Almost surely, 2^860821860 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 860821860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1280664000).

860821860 is an abundant number, since it is smaller than the sum of its proper divisors (1700506140).

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

860821860 is a wasteful number, since it uses less digits than its factorization.

860821860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3085 (or 3083 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 39.

The square root of 860821860 is about 29339.7658477364. The cubic root of 860821860 is about 951.2713762555.

The spelling of 860821860 in words is "eight hundred sixty million, eight hundred twenty-one thousand, eight hundred sixty".