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860 = 22543

• 860 can be written using four 4's:

See also 113.
860 has 12 divisors (see below), whose sum is σ = 1848. Its totient is φ = 336.

The previous prime is 859. The next prime is 863. The reversal of 860 is 68.

860 = T16 + T17 + ... + T20.

It is a happy number.

860 is an esthetic number in base 14, because in such base its adjacent digits differ by 1.

It is a hoax number, since the sum of its digits (14) coincides with the sum of the digits of its distinct prime factors.

It is a plaindrome in base 7, base 9, base 14 and base 16.

It is a nialpdrome in base 10.

It is a zygodrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2 + ... + 41.

It is an arithmetic number, because the mean of its divisors is an integer number (154).

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (924).

860 is an abundant number, since it is smaller than the sum of its proper divisors (988).

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

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

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

The sum of its prime factors is 52 (or 50 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 860 is about 29.3257565972. The cubic root of 860 is about 9.5096854131.

The spelling of 860 in words is "eight hundred sixty", and thus it is an aban number and an oban number.

Divisors: 1 2 4 5 10 20 43 86 172 215 430 860