2187240 has 64 divisors (see below), whose sum is σ = 7162560. Its totient is φ = 529920.

The previous prime is 2187233. The next prime is 2187247. The reversal of 2187240 is 427812.

It is an interprime number because it is at equal distance from previous prime (2187233) and next prime (2187247).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 2187240.

It is not an unprimeable number, because it can be changed into a prime (2187247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 492 + ... + 2148.

It is an arithmetic number, because the mean of its divisors is an integer number (111915).

2^2187240 is an apocalyptic number.

2187240 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 2187240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3581280).

2187240 is an abundant number, since it is smaller than the sum of its proper divisors (4975320).

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

2187240 is a wasteful number, since it uses less digits than its factorization.

2187240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1682 (or 1678 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 2187240 is about 1478.9320471205. The cubic root of 2187240 is about 129.8072093007.

It can be divided in two parts, 21872 and 40, that added together give a palindrome (21912).

The spelling of 2187240 in words is "two million, one hundred eighty-seven thousand, two hundred forty".