2144240 has 60 divisors (see below), whose sum is σ = 5809896. Its totient is φ = 733824.

The previous prime is 2144213. The next prime is 2144243. The reversal of 2144240 is 424412.

2144240 = T₂₇₁ + T₂₇₂ + ... + T₃₁₉.

2144240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a plaindrome in base 11.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2144243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3647 + ... + 4193.

2^2144240 is an apocalyptic number.

2144240 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 2144240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2904948).

2144240 is an abundant number, since it is smaller than the sum of its proper divisors (3665656).

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

2144240 is a wasteful number, since it uses less digits than its factorization.

2144240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574 (or 561 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 2144240 is about 1464.3223688792. The cubic root of 2144240 is about 128.9509257880.

Adding to 2144240 its reverse (424412), we get a palindrome (2568652).

The spelling of 2144240 in words is "two million, one hundred forty-four thousand, two hundred forty".