12040240 has 20 divisors (see below), whose sum is σ = 27993744. Its totient is φ = 4816064.

The previous prime is 12040213. The next prime is 12040253. The reversal of 12040240 is 4204021.

12040240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a self number, because there is not a number n which added to its sum of digits gives 12040240.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75172 + ... + 75331.

Almost surely, 2^12040240 is an apocalyptic number.

12040240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12040240 is an abundant number, since it is smaller than the sum of its proper divisors (15953504).

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

12040240 is a wasteful number, since it uses less digits than its factorization.

12040240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150516 (or 150510 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 12040240 is about 3469.9048978322. The cubic root of 12040240 is about 229.1984702234.

Adding to 12040240 its reverse (4204021), we get a palindrome (16244261).

The spelling of 12040240 in words is "twelve million, forty thousand, two hundred forty".