16856868 has 48 divisors (see below), whose sum is σ = 45584000. Its totient is φ = 4748544.

The previous prime is 16856849. The next prime is 16856869. The reversal of 16856868 is 86865861.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (16856869) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4758 + ... + 7506.

Almost surely, 2^16856868 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16856868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22792000).

16856868 is an abundant number, since it is smaller than the sum of its proper divisors (28727132).

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

16856868 is a wasteful number, since it uses less digits than its factorization.

16856868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2836 (or 2834 counting only the distinct ones).

The product of its digits is 552960, while the sum is 48.

The square root of 16856868 is about 4105.7116313740. The cubic root of 16856868 is about 256.4044915706.

The spelling of 16856868 in words is "sixteen million, eight hundred fifty-six thousand, eight hundred sixty-eight".