168851868 has 48 divisors (see below), whose sum is σ = 409278240. Its totient is φ = 54134784.

The previous prime is 168851867. The next prime is 168851869. The reversal of 168851868 is 868158861.

It is an interprime number because it is at equal distance from previous prime (168851867) and next prime (168851869).

It is a self number, because there is not a number n which added to its sum of digits gives 168851868.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168851867) 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, 37380 + ... + 41652.

It is an arithmetic number, because the mean of its divisors is an integer number (8526630).

Almost surely, 2^168851868 is an apocalyptic number.

It is an amenable number.

168851868 is an abundant number, since it is smaller than the sum of its proper divisors (240426372).

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

168851868 is a wasteful number, since it uses less digits than its factorization.

168851868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4406 (or 4404 counting only the distinct ones).

The product of its digits is 737280, while the sum is 51.

The square root of 168851868 is about 12994.3013663683. The cubic root of 168851868 is about 552.7158979608.

The spelling of 168851868 in words is "one hundred sixty-eight million, eight hundred fifty-one thousand, eight hundred sixty-eight".