1980544 has 16 divisors (see below), whose sum is σ = 3945870. Its totient is φ = 990208.

The previous prime is 1980529. The next prime is 1980577. The reversal of 1980544 is 4450891.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1742400 + 238144 = 1320^2 + 488^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7609 + ... + 7864.

2^1980544 is an apocalyptic number.

It is an amenable number.

1980544 is a deficient number, since it is larger than the sum of its proper divisors (1965326).

1980544 is an equidigital number, since it uses as much as digits as its factorization.

1980544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15487 (or 15475 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 1980544 is about 1407.3180166544. The cubic root of 1980544 is about 125.5822225911.

The spelling of 1980544 in words is "one million, nine hundred eighty thousand, five hundred forty-four".