12003640 has 32 divisors (see below), whose sum is σ = 29464560. Its totient is φ = 4364800.

The previous prime is 12003619. The next prime is 12003647. The reversal of 12003640 is 4630021.

12003640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12003647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13201 + ... + 14080.

Almost surely, 2^12003640 is an apocalyptic number.

12003640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12003640 is an abundant number, since it is smaller than the sum of its proper divisors (17460920).

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

12003640 is a wasteful number, since it uses less digits than its factorization.

12003640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27303 (or 27299 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 12003640 is about 3464.6269640468. The cubic root of 12003640 is about 228.9659948363.

Adding to 12003640 its reverse (4630021), we get a palindrome (16633661).

The spelling of 12003640 in words is "twelve million, three thousand, six hundred forty".