12820938 has 16 divisors (see below), whose sum is σ = 27614496. Its totient is φ = 3944880.

The previous prime is 12820937. The next prime is 12820961. The reversal of 12820938 is 83902821.

It is a junction number, because it is equal to n+sod(n) for n = 12820899 and 12820908.

It is not an unprimeable number, because it can be changed into a prime (12820937) 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 7 ways as a sum of consecutive naturals, for example, 82108 + ... + 82263.

It is an arithmetic number, because the mean of its divisors is an integer number (1725906).

Almost surely, 2^12820938 is an apocalyptic number.

12820938 is an abundant number, since it is smaller than the sum of its proper divisors (14793558).

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

12820938 is a wasteful number, since it uses less digits than its factorization.

12820938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164389.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 12820938 is about 3580.6337427891. The cubic root of 12820938 is about 234.0488976637.

The spelling of 12820938 in words is "twelve million, eight hundred twenty thousand, nine hundred thirty-eight".