12404640 has 96 divisors (see below), whose sum is σ = 40049856. Its totient is φ = 3225600.

The previous prime is 12404629. The next prime is 12404647. The reversal of 12404640 is 4640421.

12404640 is digitally balanced in base 2 and base 4, because in such bases 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 (96).

It is not an unprimeable number, because it can be changed into a prime (12404647) 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, 20340 + ... + 20940.

It is an arithmetic number, because the mean of its divisors is an integer number (417186).

Almost surely, 2^12404640 is an apocalyptic number.

12404640 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 12404640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20024928).

12404640 is an abundant number, since it is smaller than the sum of its proper divisors (27645216).

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

12404640 is a wasteful number, since it uses less digits than its factorization.

12404640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662 (or 654 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 12404640 is about 3522.0221464380. The cubic root of 12404640 is about 231.4877719954.

The spelling of 12404640 in words is "twelve million, four hundred four thousand, six hundred forty".