9855816 has 16 divisors (see below), whose sum is σ = 24639600. Its totient is φ = 3285264.

The previous prime is 9855793. The next prime is 9855817. The reversal of 9855816 is 6185589.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (9855817) 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, 205306 + ... + 205353.

It is an arithmetic number, because the mean of its divisors is an integer number (1539975).

Almost surely, 2^9855816 is an apocalyptic number.

It is an amenable number.

9855816 is an abundant number, since it is smaller than the sum of its proper divisors (14783784).

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

9855816 is a wasteful number, since it uses less digits than its factorization.

9855816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410668 (or 410664 counting only the distinct ones).

The product of its digits is 86400, while the sum is 42.

The square root of 9855816 is about 3139.3973944055. The cubic root of 9855816 is about 214.4030022042.

The spelling of 9855816 in words is "nine million, eight hundred fifty-five thousand, eight hundred sixteen".