1980984 has 32 divisors (see below), whose sum is σ = 5040000. Its totient is φ = 648672.

The previous prime is 1980983. The next prime is 1980991. The reversal of 1980984 is 4890891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1980983) 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 7 ways as a sum of consecutive naturals, for example, 717 + ... + 2115.

It is an arithmetic number, because the mean of its divisors is an integer number (157500).

2^1980984 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 1980984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2520000).

1980984 is an abundant number, since it is smaller than the sum of its proper divisors (3059016).

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

1980984 is a wasteful number, since it uses less digits than its factorization.

1980984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1467 (or 1463 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 1980984 is about 1407.4743336914. The cubic root of 1980984 is about 125.5915217342.

It can be divided in two parts, 19 and 80984, that added together give a triangular number (81003 = T₄₀₂).

The spelling of 1980984 in words is "one million, nine hundred eighty thousand, nine hundred eighty-four".