2740409 has 4 divisors (see below), whose sum is σ = 3131904. Its totient is φ = 2348916.

The previous prime is 2740403. The next prime is 2740421. The reversal of 2740409 is 9040472.

2740409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2740409 - 2⁴ = 2740393 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2740403) 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 3 ways as a sum of consecutive naturals, for example, 195737 + ... + 195750.

It is an arithmetic number, because the mean of its divisors is an integer number (782976).

2^2740409 is an apocalyptic number.

It is an amenable number.

2740409 is a deficient number, since it is larger than the sum of its proper divisors (391495).

2740409 is an equidigital number, since it uses as much as digits as its factorization.

2740409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391494.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 2740409 is about 1655.4180740828. The cubic root of 2740409 is about 139.9389019112.

The spelling of 2740409 in words is "two million, seven hundred forty thousand, four hundred nine".