1980558 has 16 divisors (see below), whose sum is σ = 4401360. Its totient is φ = 660168.

The previous prime is 1980529. The next prime is 1980577. The reversal of 1980558 is 8550891.

It is a super-3 number, since 3×1980558³ = 23306869797827703336, which contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18285 + ... + 18392.

It is an arithmetic number, because the mean of its divisors is an integer number (275085).

2^1980558 is an apocalyptic number.

1980558 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1980558 is an abundant number, since it is smaller than the sum of its proper divisors (2420802).

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

1980558 is a wasteful number, since it uses less digits than its factorization.

1980558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36688 (or 36682 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 36.

The square root of 1980558 is about 1407.3229906457. The cubic root of 1980558 is about 125.5825184941.

The spelling of 1980558 in words is "one million, nine hundred eighty thousand, five hundred fifty-eight".