840984 has 32 divisors (see below), whose sum is σ = 2137920. Its totient is φ = 275616.

The previous prime is 840979. The next prime is 840989. The reversal of 840984 is 489048.

It is an interprime number because it is at equal distance from previous prime (840979) and next prime (840989).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 840984.

It is not an unprimeable number, because it can be changed into a prime (840989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1347 + ... + 1869.

It is an arithmetic number, because the mean of its divisors is an integer number (66810).

2⁸⁴⁰⁹⁸⁴ is an apocalyptic number.

It is an amenable number.

840984 is an abundant number, since it is smaller than the sum of its proper divisors (1296936).

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

840984 is a wasteful number, since it uses less digits than its factorization.

840984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599 (or 595 counting only the distinct ones).

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

The square root of 840984 is about 917.0517978828. The cubic root of 840984 is about 94.3907081729.

The spelling of 840984 in words is "eight hundred forty thousand, nine hundred eighty-four".