2187280 has 40 divisors (see below), whose sum is σ = 5356800. Its totient is φ = 828288.

The previous prime is 2187259. The next prime is 2187287. The reversal of 2187280 is 827812.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2187287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 801 + ... + 2239.

It is an arithmetic number, because the mean of its divisors is an integer number (133920).

2^2187280 is an apocalyptic number.

2187280 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 2187280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2678400).

2187280 is an abundant number, since it is smaller than the sum of its proper divisors (3169520).

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

2187280 is a wasteful number, since it uses less digits than its factorization.

2187280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1471 (or 1465 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 2187280 is about 1478.9455703304. The cubic root of 2187280 is about 129.8080005958.

It can be divided in two parts, 21872 and 80, that added together give a cube (21952 = 28³).

The spelling of 2187280 in words is "two million, one hundred eighty-seven thousand, two hundred eighty".