2140344 has 56 divisors (see below), whose sum is σ = 6033360. Its totient is φ = 711504.

The previous prime is 2140337. The next prime is 2140349. The reversal of 2140344 is 4430412.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2140349) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 5649 + ... + 6015.

2^2140344 is an apocalyptic number.

2140344 is a gapful number since it is divisible by the number (24) 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 2140344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3016680).

2140344 is an abundant number, since it is smaller than the sum of its proper divisors (3893016).

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

2140344 is an equidigital number, since it uses as much as digits as its factorization.

2140344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391 (or 372 counting only the distinct ones).

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

The square root of 2140344 is about 1462.9914558876. The cubic root of 2140344 is about 128.8727788470.

Adding to 2140344 its reverse (4430412), we get a palindrome (6570756).

The spelling of 2140344 in words is "two million, one hundred forty thousand, three hundred forty-four".