9851816 has 32 divisors (see below), whose sum is σ = 20364960. Its totient is φ = 4439232.

The previous prime is 9851813. The next prime is 9851837. The reversal of 9851816 is 6181589.

It is a self number, because there is not a number n which added to its sum of digits gives 9851816.

It is not an unprimeable number, because it can be changed into a prime (9851813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3371 + ... + 5573.

It is an arithmetic number, because the mean of its divisors is an integer number (636405).

Almost surely, 2^9851816 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 9851816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10182480).

9851816 is an abundant number, since it is smaller than the sum of its proper divisors (10513144).

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

9851816 is a wasteful number, since it uses less digits than its factorization.

9851816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2265 (or 2261 counting only the distinct ones).

The product of its digits is 17280, while the sum is 38.

The square root of 9851816 is about 3138.7602648179. The cubic root of 9851816 is about 214.3739930027.

The spelling of 9851816 in words is "nine million, eight hundred fifty-one thousand, eight hundred sixteen".