1986384 has 40 divisors (see below), whose sum is σ = 5312160. Its totient is φ = 638848.

The previous prime is 1986373. The next prime is 1986401. The reversal of 1986384 is 4836891.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 679 + ... + 2105.

It is an arithmetic number, because the mean of its divisors is an integer number (132804).

2^1986384 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 1986384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2656080).

1986384 is an abundant number, since it is smaller than the sum of its proper divisors (3325776).

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

1986384 is a wasteful number, since it uses less digits than its factorization.

1986384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1467 (or 1461 counting only the distinct ones).

The product of its digits is 41472, while the sum is 39.

The square root of 1986384 is about 1409.3913579982. The cubic root of 1986384 is about 125.7055355972.

The spelling of 1986384 in words is "one million, nine hundred eighty-six thousand, three hundred eighty-four".