12620636 has 36 divisors (see below), whose sum is σ = 27052200. Its totient is φ = 5122656.

The previous prime is 12620633. The next prime is 12620653. The reversal of 12620636 is 63602621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12620633) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2030 + ... + 5418.

It is an arithmetic number, because the mean of its divisors is an integer number (751450).

Almost surely, 2^12620636 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12620636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13526100).

12620636 is an abundant number, since it is smaller than the sum of its proper divisors (14431564).

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

12620636 is a wasteful number, since it uses less digits than its factorization.

12620636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3426 (or 3417 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 12620636 is about 3552.5534478738. The cubic root of 12620636 is about 232.8236430052.

The spelling of 12620636 in words is "twelve million, six hundred twenty thousand, six hundred thirty-six".