2180844 has 60 divisors (see below), whose sum is σ = 5854464. Its totient is φ = 707616.

The previous prime is 2180833. The next prime is 2180863. The reversal of 2180844 is 4480812.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 17109 + ... + 17235.

2^2180844 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2180844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2927232).

2180844 is an abundant number, since it is smaller than the sum of its proper divisors (3673620).

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

2180844 is a wasteful number, since it uses less digits than its factorization.

2180844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196 (or 185 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 2180844 is about 1476.7680928297. The cubic root of 2180844 is about 129.6805569129.

Subtracting 2180844 from its reverse (4480812), we obtain a cube (2299968 = 132³).

The spelling of 2180844 in words is "two million, one hundred eighty thousand, eight hundred forty-four".