16816 has 10 divisors (see below), whose sum is σ = 32612.
Its totient is φ = 8400.
The previous prime is 16811. The next prime is 16823. The reversal of 16816 is 61861.
It is not an unprimeable number, because it can be changed into a prime (16811) by changing a digit.
16816 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 (5) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510 + ... + 541.
216816 is an apocalyptic number.
16816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.
It is an amenable number.
16816 is a deficient number, since it is larger than the sum of its proper divisors (15796).
16816 is a wasteful number, since it uses less digits than its factorization.
16816 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1059 (or 1053 counting only the distinct ones).
The product of its digits is 288, while the sum is 22.
The square root of 16816 is about 129.6765206196.
The cubic root of 16816 is about 25.6197113813.
The spelling of 16816 in words is "sixteen thousand, eight hundred sixteen".