1980144 has 30 divisors (see below), whose sum is σ = 5542056. Its totient is φ = 660000.

The previous prime is 1980113. The next prime is 1980169. The reversal of 1980144 is 4410891.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6732 + ... + 7019.

2^1980144 is an apocalyptic number.

It is an amenable number.

1980144 is an abundant number, since it is smaller than the sum of its proper divisors (3561912).

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

1980144 is a wasteful number, since it uses less digits than its factorization.

1980144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13765 (or 13756 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 1980144 is about 1407.1758951887. The cubic root of 1980144 is about 125.5737676293.

The spelling of 1980144 in words is "one million, nine hundred eighty thousand, one hundred forty-four".