9818840 has 16 divisors (see below), whose sum is σ = 22092480. Its totient is φ = 3927520.

The previous prime is 9818827. The next prime is 9818867. The reversal of 9818840 is 488189.

9818840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 9818794 and 9818803.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122696 + ... + 122775.

It is an arithmetic number, because the mean of its divisors is an integer number (1380780).

Almost surely, 2^9818840 is an apocalyptic number.

It is an amenable number.

9818840 is an abundant number, since it is smaller than the sum of its proper divisors (12273640).

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

9818840 is a wasteful number, since it uses less digits than its factorization.

9818840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245482 (or 245478 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 38.

The square root of 9818840 is about 3133.5028322949. The cubic root of 9818840 is about 214.1345414190.

The spelling of 9818840 in words is "nine million, eight hundred eighteen thousand, eight hundred forty".