1980444 has 12 divisors (see below), whose sum is σ = 4621064. Its totient is φ = 660144.

The previous prime is 1980443. The next prime is 1980469. The reversal of 1980444 is 4440891.

It is a tau number, because it is divible by the number of its divisors (12).

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1980443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82507 + ... + 82530.

2^1980444 is an apocalyptic number.

It is an amenable number.

1980444 is an abundant number, since it is smaller than the sum of its proper divisors (2640620).

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

1980444 is a wasteful number, since it uses less digits than its factorization.

1980444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165044 (or 165042 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 1980444 is about 1407.2824876335. The cubic root of 1980444 is about 125.5801089574.

The spelling of 1980444 in words is "one million, nine hundred eighty thousand, four hundred forty-four".