1986012 has 96 divisors (see below), whose sum is σ = 6128640. Its totient is φ = 544320.

The previous prime is 1986001. The next prime is 1986029. The reversal of 1986012 is 2106891.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27937 + ... + 28007.

It is an arithmetic number, because the mean of its divisors is an integer number (63840).

2^1986012 is an apocalyptic number.

1986012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1986012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3064320).

1986012 is an abundant number, since it is smaller than the sum of its proper divisors (4142628).

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

1986012 is a wasteful number, since it uses less digits than its factorization.

1986012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128 (or 120 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 1986012 is about 1409.2593799581. The cubic root of 1986012 is about 125.6976879406.

The spelling of 1986012 in words is "one million, nine hundred eighty-six thousand, twelve".