12017440 has 24 divisors (see below), whose sum is σ = 28391580. Its totient is φ = 4806912.

The previous prime is 12017413. The next prime is 12017449. The reversal of 12017440 is 4471021.

It can be written as a sum of positive squares in 2 ways, for example, as 11751184 + 266256 = 3428^2 + 516^2 .

It is not an unprimeable number, because it can be changed into a prime (12017449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37395 + ... + 37714.

Almost surely, 2^12017440 is an apocalyptic number.

12017440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12017440 is an abundant number, since it is smaller than the sum of its proper divisors (16374140).

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

12017440 is an equidigital number, since it uses as much as digits as its factorization.

12017440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75124 (or 75116 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 12017440 is about 3466.6179483756. The cubic root of 12017440 is about 229.0537049153.

Adding to 12017440 its reverse (4471021), we get a palindrome (16488461).

The spelling of 12017440 in words is "twelve million, seventeen thousand, four hundred forty".