12040056 has 64 divisors (see below), whose sum is σ = 38227200. Its totient is φ = 3439584.

The previous prime is 12040027. The next prime is 12040057. The reversal of 12040056 is 65004021.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12040057) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2470 + ... + 5493.

It is an arithmetic number, because the mean of its divisors is an integer number (597300).

Almost surely, 2^12040056 is an apocalyptic number.

It is an amenable number.

12040056 is an abundant number, since it is smaller than the sum of its proper divisors (26187144).

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

12040056 is a wasteful number, since it uses less digits than its factorization.

12040056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7985 (or 7975 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 12040056 is about 3469.8783840360. The cubic root of 12040056 is about 229.1973026738.

Adding to 12040056 its reverse (65004021), we get a palindrome (77044077).

The spelling of 12040056 in words is "twelve million, forty thousand, fifty-six".