1980489 has 8 divisors (see below), whose sum is σ = 3017920. Its totient is φ = 1131696.

The previous prime is 1980469. The next prime is 1980491. The reversal of 1980489 is 9840891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1980489 - 2⁷ = 1980361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1980409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47134 + ... + 47175.

It is an arithmetic number, because the mean of its divisors is an integer number (377240).

2^1980489 is an apocalyptic number.

It is an amenable number.

1980489 is a deficient number, since it is larger than the sum of its proper divisors (1037431).

1980489 is an equidigital number, since it uses as much as digits as its factorization.

1980489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94319.

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

The square root of 1980489 is about 1407.2984758039. The cubic root of 1980489 is about 125.5810601013.

It can be divided in two parts, 19 and 80489, that added together give a palindrome (80508).

The spelling of 1980489 in words is "one million, nine hundred eighty thousand, four hundred eighty-nine".