1989580 has 24 divisors (see below), whose sum is σ = 4314240. Its totient is φ = 769920.

The previous prime is 1989571. The next prime is 1989583. The reversal of 1989580 is 859891.

It is not an unprimeable number, because it can be changed into a prime (1989583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 985 + ... + 2224.

It is an arithmetic number, because the mean of its divisors is an integer number (179760).

2^1989580 is an apocalyptic number.

1989580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1989580 is an abundant number, since it is smaller than the sum of its proper divisors (2324660).

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

1989580 is a wasteful number, since it uses less digits than its factorization.

1989580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3249 (or 3247 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 40.

The square root of 1989580 is about 1410.5247250580. The cubic root of 1989580 is about 125.7729176032.

The spelling of 1989580 in words is "one million, nine hundred eighty-nine thousand, five hundred eighty".