16446 has 8 divisors (see below), whose sum is σ = 32904. Its totient is φ = 5480.

The previous prime is 16433. The next prime is 16447. The reversal of 16446 is 64461.

It is a sphenic number, since it is the product of 3 distinct primes.

16446 is an admirable number.

It is a nialpdrome in base 13.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 16446.

It is not an unprimeable number, because it can be changed into a prime (16447) by changing a digit.

16446 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1365 + ... + 1376.

It is an arithmetic number, because the mean of its divisors is an integer number (4113).

2¹⁶⁴⁴⁶ is an apocalyptic number.

16446 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16452).

16446 is a wasteful number, since it uses less digits than its factorization.

16446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2746.

The product of its digits is 576, while the sum is 21.

The square root of 16446 is about 128.2419588122. The cubic root of 16446 is about 25.4304138955.

It can be divided in two parts, 164 and 46, that added together give a triangular number (210 = T₂₀).

The spelling of 16446 in words is "sixteen thousand, four hundred forty-six".