12820636 has 12 divisors (see below), whose sum is σ = 22479912. Its totient is φ = 6397808.

The previous prime is 12820631. The next prime is 12820657. The reversal of 12820636 is 63602821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12820631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 595 + ... + 5098.

It is an arithmetic number, because the mean of its divisors is an integer number (1873326).

Almost surely, 2^12820636 is an apocalyptic number.

It is an amenable number.

12820636 is a deficient number, since it is larger than the sum of its proper divisors (9659276).

12820636 is a wasteful number, since it uses less digits than its factorization.

12820636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6260 (or 6258 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 12820636 is about 3580.5915712351. The cubic root of 12820636 is about 234.0470599582.

It can be divided in two parts, 12820 and 636, that added together give a square (13456 = 116²).

The spelling of 12820636 in words is "twelve million, eight hundred twenty thousand, six hundred thirty-six".