12646040 has 64 divisors (see below), whose sum is σ = 31842720. Its totient is φ = 4480000.

The previous prime is 12646033. The next prime is 12646043. The reversal of 12646040 is 4064621.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12645997 and 12646015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12646043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17690 + ... + 18390.

Almost surely, 2^12646040 is an apocalyptic number.

12646040 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 12646040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15921360).

12646040 is an abundant number, since it is smaller than the sum of its proper divisors (19196680).

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

12646040 is a wasteful number, since it uses less digits than its factorization.

12646040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 764 (or 760 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 12646040 is about 3556.1271068397. The cubic root of 12646040 is about 232.9797547294.

The spelling of 12646040 in words is "twelve million, six hundred forty-six thousand, forty".