12013938 has 12 divisors (see below), whose sum is σ = 26030238. Its totient is φ = 4004640.

The previous prime is 12013931. The next prime is 12013949. The reversal of 12013938 is 83931021.

It can be written as a sum of positive squares in only one way, i.e., 8105409 + 3908529 = 2847^2 + 1977^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12013931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 333703 + ... + 333738.

Almost surely, 2^12013938 is an apocalyptic number.

12013938 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12013938 is an abundant number, since it is smaller than the sum of its proper divisors (14016300).

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

12013938 is a wasteful number, since it uses less digits than its factorization.

12013938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667449 (or 667446 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 12013938 is about 3466.1128083200. The cubic root of 12013938 is about 229.0314532542.

Adding to 12013938 its reverse (83931021), we get a palindrome (95944959).

The spelling of 12013938 in words is "twelve million, thirteen thousand, nine hundred thirty-eight".