1803980 has 12 divisors (see below), whose sum is σ = 3788400. Its totient is φ = 721584.

The previous prime is 1803973. The next prime is 1804007. The reversal of 1803980 is 893081.

It is a happy 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 3 ways as a sum of consecutive naturals, for example, 45080 + ... + 45119.

It is an arithmetic number, because the mean of its divisors is an integer number (315700).

2^1803980 is an apocalyptic number.

1803980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1803980 is an abundant number, since it is smaller than the sum of its proper divisors (1984420).

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

1803980 is a wasteful number, since it uses less digits than its factorization.

1803980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90208 (or 90206 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 1803980 is about 1343.1232259179. The cubic root of 1803980 is about 121.7336300754.

The spelling of 1803980 in words is "one million, eight hundred three thousand, nine hundred eighty".