2144340 has 144 divisors (see below), whose sum is σ = 7680960. Its totient is φ = 492480.

The previous prime is 2144323. The next prime is 2144369. The reversal of 2144340 is 434412.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a zygodrome in base 3.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 112851 + ... + 112869.

It is an arithmetic number, because the mean of its divisors is an integer number (53340).

2^2144340 is an apocalyptic number.

2144340 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 2144340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3840480).

2144340 is an abundant number, since it is smaller than the sum of its proper divisors (5536620).

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

2144340 is a wasteful number, since it uses less digits than its factorization.

2144340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67 (or 40 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 2144340 is about 1464.3565139678. The cubic root of 2144340 is about 128.9529303665.

Adding to 2144340 its reverse (434412), we get a palindrome (2578752).

It can be divided in two parts, 214 and 4340, that added together give a palindrome (4554).

The spelling of 2144340 in words is "two million, one hundred forty-four thousand, three hundred forty".