2140440 has 32 divisors (see below), whose sum is σ = 6421680. Its totient is φ = 570752.

The previous prime is 2140421. The next prime is 2140441. The reversal of 2140440 is 440412.

2140440 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2140441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8799 + ... + 9038.

2^2140440 is an apocalyptic number.

2140440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2140440 is an abundant number, since it is smaller than the sum of its proper divisors (4281240).

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

2140440 is a wasteful number, since it uses less digits than its factorization.

2140440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17851 (or 17847 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 2140440 is about 1463.0242650072. The cubic root of 2140440 is about 128.8747055781.

Adding to 2140440 its reverse (440412), we get a palindrome (2580852).

The spelling of 2140440 in words is "two million, one hundred forty thousand, four hundred forty".