16680028 has 6 divisors (see below), whose sum is σ = 29190056. Its totient is φ = 8340012.

The previous prime is 16680019. The next prime is 16680029. The reversal of 16680028 is 82008661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16680029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2085000 + ... + 2085007.

Almost surely, 2^16680028 is an apocalyptic number.

It is an amenable number.

16680028 is a deficient number, since it is larger than the sum of its proper divisors (12510028).

16680028 is a wasteful number, since it uses less digits than its factorization.

16680028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4170011 (or 4170009 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 16680028 is about 4084.1189992457. The cubic root of 16680028 is about 255.5047186703.

Adding to 16680028 its reverse (82008661), we get a palindrome (98688689).

The spelling of 16680028 in words is "sixteen million, six hundred eighty thousand, twenty-eight".