12606640 has 40 divisors (see below), whose sum is σ = 30109680. Its totient is φ = 4905216.

The previous prime is 12606631. The next prime is 12606641. The reversal of 12606640 is 4660621.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (12606641) 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, 831 + ... + 5089.

It is an arithmetic number, because the mean of its divisors is an integer number (752742).

Almost surely, 2^12606640 is an apocalyptic number.

12606640 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 12606640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15054840).

12606640 is an abundant number, since it is smaller than the sum of its proper divisors (17503040).

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

12606640 is a wasteful number, since it uses less digits than its factorization.

12606640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4309 (or 4303 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 12606640 is about 3550.5830507115. The cubic root of 12606640 is about 232.7375457853.

The spelling of 12606640 in words is "twelve million, six hundred six thousand, six hundred forty".