9838840 has 64 divisors (see below), whose sum is σ = 24624000. Its totient is φ = 3507840.

The previous prime is 9838831. The next prime is 9838853. The reversal of 9838840 is 488389.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 9838793 and 9838802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25771 + ... + 26149.

It is an arithmetic number, because the mean of its divisors is an integer number (384750).

Almost surely, 2^9838840 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 9838840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12312000).

9838840 is an abundant number, since it is smaller than the sum of its proper divisors (14785160).

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

9838840 is a wasteful number, since it uses less digits than its factorization.

9838840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460 (or 456 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 9838840 is about 3136.6925255753. The cubic root of 9838840 is about 214.2798330661.

The spelling of 9838840 in words is "nine million, eight hundred thirty-eight thousand, eight hundred forty".