12000040 has 64 divisors (see below), whose sum is σ = 29756160. Its totient is φ = 4327680.

The previous prime is 12000029. The next prime is 12000073. The reversal of 12000040 is 4000021.

12000040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 11999987 and 12000032.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24195 + ... + 24685.

It is an arithmetic number, because the mean of its divisors is an integer number (464940).

Almost surely, 2^12000040 is an apocalyptic number.

12000040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12000040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14878080).

12000040 is an abundant number, since it is smaller than the sum of its proper divisors (17756120).

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

12000040 is a wasteful number, since it uses less digits than its factorization.

12000040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562 (or 558 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 12000040 is about 3464.1073886356. The cubic root of 12000040 is about 228.9431028913.

Adding to 12000040 its reverse (4000021), we get a palindrome (16000061).

The spelling of 12000040 in words is "twelve million, forty", and thus it is an aban number and an uban number.