984840 has 64 divisors (see below), whose sum is σ = 3067200. Its totient is φ = 252672.

The previous prime is 984817. The next prime is 984847. The reversal of 984840 is 48489.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 984840.

It is not an unprimeable number, because it can be changed into a prime (984847) by changing a digit.

984840 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3339 + ... + 3621.

It is an arithmetic number, because the mean of its divisors is an integer number (47925).

2⁹⁸⁴⁸⁴⁰ 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 984840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1533600).

984840 is an abundant number, since it is smaller than the sum of its proper divisors (2082360).

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

984840 is a wasteful number, since it uses less digits than its factorization.

984840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326 (or 322 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 984840 is about 992.3910519548. The cubic root of 984840 is about 99.4920913219.

The spelling of 984840 in words is "nine hundred eighty-four thousand, eight hundred forty".