2181360 has 80 divisors (see below), whose sum is σ = 6919200. Its totient is φ = 568320.

The previous prime is 2181359. The next prime is 2181373. The reversal of 2181360 is 631812.

It is a tau number, because it is divible by the number of its divisors (80).

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, 14566 + ... + 14714.

It is an arithmetic number, because the mean of its divisors is an integer number (86490).

2^2181360 is an apocalyptic number.

2181360 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 2181360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3459600).

2181360 is an abundant number, since it is smaller than the sum of its proper divisors (4737840).

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

2181360 is a wasteful number, since it uses less digits than its factorization.

2181360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226 (or 220 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 2181360 is about 1476.9427883300. The cubic root of 2181360 is about 129.6907838236.

The spelling of 2181360 in words is "two million, one hundred eighty-one thousand, three hundred sixty".