2311240 has 16 divisors (see below), whose sum is σ = 5200380. Its totient is φ = 924480.

The previous prime is 2311237. The next prime is 2311249. The reversal of 2311240 is 421132.

It can be written as a sum of positive squares in 2 ways, for example, as 2292196 + 19044 = 1514^2 + 138^2 .

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 2311240.

It is not an unprimeable number, because it can be changed into a prime (2311249) 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, 28851 + ... + 28930.

2^2311240 is an apocalyptic number.

2311240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2311240 is an abundant number, since it is smaller than the sum of its proper divisors (2889140).

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

2311240 is a wasteful number, since it uses less digits than its factorization.

2311240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57792 (or 57788 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 2311240 is about 1520.2762906788. The cubic root of 2311240 is about 132.2152899357.

Adding to 2311240 its reverse (421132), we get a palindrome (2732372).

The spelling of 2311240 in words is "two million, three hundred eleven thousand, two hundred forty".