2184780 has 48 divisors (see below), whose sum is σ = 6590304. Its totient is φ = 537600.

The previous prime is 2184779. The next prime is 2184799. The reversal of 2184780 is 874812.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 621 + ... + 2180.

It is an arithmetic number, because the mean of its divisors is an integer number (137298).

2^2184780 is an apocalyptic number.

2184780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2184780 is an abundant number, since it is smaller than the sum of its proper divisors (4405524).

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

2184780 is a wasteful number, since it uses less digits than its factorization.

2184780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2826 (or 2824 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 2184780 is about 1478.1001319261. The cubic root of 2184780 is about 129.7585261010.

The spelling of 2184780 in words is "two million, one hundred eighty-four thousand, seven hundred eighty".