1986648 has 64 divisors (see below), whose sum is σ = 5356800. Its totient is φ = 612480.

The previous prime is 1986631. The next prime is 1986679. The reversal of 1986648 is 8466891.

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, 32538 + ... + 32598.

It is an arithmetic number, because the mean of its divisors is an integer number (83700).

2^1986648 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 1986648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2678400).

1986648 is an abundant number, since it is smaller than the sum of its proper divisors (3370152).

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

1986648 is a wasteful number, since it uses less digits than its factorization.

1986648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152 (or 148 counting only the distinct ones).

The product of its digits is 82944, while the sum is 42.

The square root of 1986648 is about 1409.4850123361. The cubic root of 1986648 is about 125.7111043075.

The spelling of 1986648 in words is "one million, nine hundred eighty-six thousand, six hundred forty-eight".