2187980 has 24 divisors (see below), whose sum is σ = 4744320. Its totient is φ = 846720.

The previous prime is 2187979. The next prime is 2188001. The reversal of 2187980 is 897812.

It is a happy number.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 2187980.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1145 + ... + 2384.

It is an arithmetic number, because the mean of its divisors is an integer number (197680).

2^2187980 is an apocalyptic number.

2187980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2187980 is an abundant number, since it is smaller than the sum of its proper divisors (2556340).

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

2187980 is a wasteful number, since it uses less digits than its factorization.

2187980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3569 (or 3567 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 35.

The square root of 2187980 is about 1479.1822064911. The cubic root of 2187980 is about 129.8218466982.

The spelling of 2187980 in words is "two million, one hundred eighty-seven thousand, nine hundred eighty".