2740240 has 20 divisors (see below), whose sum is σ = 6371244. Its totient is φ = 1096064.

The previous prime is 2740223. The next prime is 2740249. The reversal of 2740240 is 420472.

It can be written as a sum of positive squares in 2 ways, for example, as 746496 + 1993744 = 864^2 + 1412^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (2740249) 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 3 ways as a sum of consecutive naturals, for example, 17047 + ... + 17206.

2^2740240 is an apocalyptic number.

2740240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2740240 is an abundant number, since it is smaller than the sum of its proper divisors (3631004).

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

2740240 is a wasteful number, since it uses less digits than its factorization.

2740240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34266 (or 34260 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 19.

The square root of 2740240 is about 1655.3670287885. The cubic root of 2740240 is about 139.9360251921.

The spelling of 2740240 in words is "two million, seven hundred forty thousand, two hundred forty".