860206644 has 36 divisors (see below), whose sum is σ = 2372086080. Its totient is φ = 260668560.

The previous prime is 860206637. The next prime is 860206657. The reversal of 860206644 is 446602068.

It is a happy number.

860206644 is a `hidden beast` number, since 8 + 6 + 0 + 2 + 0 + 6 + 644 = 666.

860206644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a junction number, because it is equal to n+sod(n) for n = 860206599 and 860206608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1085724 + ... + 1086515.

It is an arithmetic number, because the mean of its divisors is an integer number (65891280).

Almost surely, 2^860206644 is an apocalyptic number.

It is an amenable number.

860206644 is an abundant number, since it is smaller than the sum of its proper divisors (1511879436).

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

860206644 is a wasteful number, since it uses less digits than its factorization.

860206644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2172260 (or 2172255 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

The square root of 860206644 is about 29329.2796365680. The cubic root of 860206644 is about 951.0447026259.

The spelling of 860206644 in words is "eight hundred sixty million, two hundred six thousand, six hundred forty-four".