860215680 has 256 divisors, whose sum is σ = 3096230400. Its totient is φ = 225662976.

The previous prime is 860215651. The next prime is 860215703. The reversal of 860215680 is 86512068.

It is a happy number.

It is a super-2 number, since 2×860215680² = 1479942032235724800, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1157389 + ... + 1158131.

It is an arithmetic number, because the mean of its divisors is an integer number (12094650).

Almost surely, 2^860215680 is an apocalyptic number.

860215680 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 860215680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1548115200).

860215680 is an abundant number, since it is smaller than the sum of its proper divisors (2236014720).

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

860215680 is a wasteful number, since it uses less digits than its factorization.

860215680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 838 (or 820 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 860215680 is about 29329.4336801787. The cubic root of 860215680 is about 951.0480326823.

The spelling of 860215680 in words is "eight hundred sixty million, two hundred fifteen thousand, six hundred eighty".