16685628 has 12 divisors (see below), whose sum is σ = 38933160. Its totient is φ = 5561872.

The previous prime is 16685621. The next prime is 16685633. The reversal of 16685628 is 82658661.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 16685628.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16685621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 695223 + ... + 695246.

It is an arithmetic number, because the mean of its divisors is an integer number (3244430).

Almost surely, 2^16685628 is an apocalyptic number.

It is an amenable number.

16685628 is an abundant number, since it is smaller than the sum of its proper divisors (22247532).

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

16685628 is a wasteful number, since it uses less digits than its factorization.

16685628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1390476 (or 1390474 counting only the distinct ones).

The product of its digits is 138240, while the sum is 42.

The square root of 16685628 is about 4084.8045240868. The cubic root of 16685628 is about 255.5333090766.

The spelling of 16685628 in words is "sixteen million, six hundred eighty-five thousand, six hundred twenty-eight".