9681816 has 32 divisors (see below), whose sum is σ = 24433200. Its totient is φ = 3196800.

The previous prime is 9681809. The next prime is 9681829. The reversal of 9681816 is 6181869.

It is a super-2 number, since 2×9681816² = 187475122115712, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 766 + ... + 4466.

Almost surely, 2^9681816 is an apocalyptic number.

It is an amenable number.

9681816 is an abundant number, since it is smaller than the sum of its proper divisors (14751384).

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

9681816 is a wasteful number, since it uses less digits than its factorization.

9681816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3819 (or 3815 counting only the distinct ones).

The product of its digits is 20736, while the sum is 39.

The square root of 9681816 is about 3111.5616657878. The cubic root of 9681816 is about 213.1337738868.

The spelling of 9681816 in words is "nine million, six hundred eighty-one thousand, eight hundred sixteen".