16628 has 6 divisors (see below), whose sum is σ = 29106.
Its totient is φ = 8312.
The previous prime is 16619. The next prime is 16631. The reversal of 16628 is 82661.
It can be written as a sum of positive squares in only one way, i.e., 13924 + 2704 = 118^2 + 52^2
It is a nialpdrome in base 13.
It is a congruent number.
It is an unprimeable number.
16628 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 as a sum of consecutive naturals, namely, 2075 + ... + 2082.
It is an arithmetic number, because the mean of its divisors is an integer number (4851).
216628 is an apocalyptic number.
It is an amenable number.
16628 is a deficient number, since it is larger than the sum of its proper divisors (12478).
16628 is a wasteful number, since it uses less digits than its factorization.
16628 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 4161 (or 4159 counting only the distinct ones).
The product of its digits is 576, while the sum is 23.
The square root of 16628 is about 128.9496025585.
The cubic root of 16628 is about 25.5238786962.
The spelling of 16628 in words is "sixteen thousand, six hundred twenty-eight".