16870 has 16 divisors (see below), whose sum is σ = 34848. Its totient is φ = 5760.

The previous prime is 16843. The next prime is 16871. The reversal of 16870 is 7861.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16871) by changing a digit.

16870 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51 + ... + 190.

It is an arithmetic number, because the mean of its divisors is an integer number (2178).

2¹⁶⁸⁷⁰ is an apocalyptic number.

16870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16870 is an abundant number, since it is smaller than the sum of its proper divisors (17978).

It is a weird number, because it is abundant, but not a pseudoperfect number.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17424).

16870 is a wasteful number, since it uses less digits than its factorization.

16870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 16870 is about 129.8845641329. The cubic root of 16870 is about 25.6471056522.

Subtracting from 16870 its reverse (7861), we obtain a palindrome (9009).

The spelling of 16870 in words is "sixteen thousand, eight hundred seventy".