2161760 has 48 divisors (see below), whose sum is σ = 5216400. Its totient is φ = 846336.

The previous prime is 2161759. The next prime is 2161769. The reversal of 2161760 is 671612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161769) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9326 + ... + 9554.

It is an arithmetic number, because the mean of its divisors is an integer number (108675).

2^2161760 is an apocalyptic number.

2161760 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2161760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2608200).

2161760 is an abundant number, since it is smaller than the sum of its proper divisors (3054640).

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

2161760 is a wasteful number, since it uses less digits than its factorization.

2161760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303 (or 295 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 2161760 is about 1470.2924879084. The cubic root of 2161760 is about 129.3011811764.

The spelling of 2161760 in words is "two million, one hundred sixty-one thousand, seven hundred sixty".