986840 has 16 divisors (see below), whose sum is σ = 2220480. Its totient is φ = 394720.

The previous prime is 986837. The next prime is 986849. The reversal of 986840 is 48689.

It is a self number, because there is not a number n which added to its sum of digits gives 986840.

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 986840.

It is not an unprimeable number, because it can be changed into a prime (986849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12296 + ... + 12375.

It is an arithmetic number, because the mean of its divisors is an integer number (138780).

2⁹⁸⁶⁸⁴⁰ is an apocalyptic number.

It is an amenable number.

986840 is an abundant number, since it is smaller than the sum of its proper divisors (1233640).

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

986840 is a wasteful number, since it uses less digits than its factorization.

986840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24682 (or 24678 counting only the distinct ones).

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

The square root of 986840 is about 993.3982081723. The cubic root of 986840 is about 99.5593948556.

The spelling of 986840 in words is "nine hundred eighty-six thousand, eight hundred forty".