12938818 has 16 divisors (see below), whose sum is σ = 20165760. Its totient is φ = 6221776.

The previous prime is 12938813. The next prime is 12938831. The reversal of 12938818 is 81883921.

It is a super-2 number, since 2×12938818² = 334826022474248, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12938813) 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, 4380 + ... + 6712.

It is an arithmetic number, because the mean of its divisors is an integer number (1260360).

Almost surely, 2^12938818 is an apocalyptic number.

12938818 is a deficient number, since it is larger than the sum of its proper divisors (7226942).

12938818 is a wasteful number, since it uses less digits than its factorization.

12938818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2441.

The product of its digits is 27648, while the sum is 40.

The square root of 12938818 is about 3597.0568524837. The cubic root of 12938818 is about 234.7640184312.

The spelling of 12938818 in words is "twelve million, nine hundred thirty-eight thousand, eight hundred eighteen".