2540836 has 9 divisors (see below), whose sum is σ = 4452049. Its totient is φ = 1268824.

The previous prime is 2540831. The next prime is 2540849. The reversal of 2540836 is 6380452.

The square root of 2540836 is 1594.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1232100 + 1308736 = 1110^2 + 1144^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2540831) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2790 + ... + 3586.

2^2540836 is an apocalyptic number.

2540836 is the 1594-th square number.

It is an amenable number.

2540836 is a deficient number, since it is larger than the sum of its proper divisors (1911213).

2540836 is an frugal number, since it uses more digits than its factorization.

2540836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1598 (or 799 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The cubic root of 2540836 is about 136.4558664408.

The spelling of 2540836 in words is "two million, five hundred forty thousand, eight hundred thirty-six".