9806840 has 16 divisors (see below), whose sum is σ = 22065480. Its totient is φ = 3922720.

The previous prime is 9806837. The next prime is 9806861. The reversal of 9806840 is 486089.

It is a super-2 number, since 2×9806840² = 192348221571200, which contains 22 as substring.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 9806840.

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 3 ways as a sum of consecutive naturals, for example, 122546 + ... + 122625.

Almost surely, 2^9806840 is an apocalyptic number.

It is an amenable number.

9806840 is an abundant number, since it is smaller than the sum of its proper divisors (12258640).

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

9806840 is a wasteful number, since it uses less digits than its factorization.

9806840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245182 (or 245178 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 9806840 is about 3131.5874568659. The cubic root of 9806840 is about 214.0472717069.

The spelling of 9806840 in words is "nine million, eight hundred six thousand, eight hundred forty".