12618438 has 16 divisors (see below), whose sum is σ = 28842240. Its totient is φ = 3605256.

The previous prime is 12618377. The next prime is 12618449. The reversal of 12618438 is 83481621.

It is a junction number, because it is equal to n+sod(n) for n = 12618399 and 12618408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150178 + ... + 150261.

It is an arithmetic number, because the mean of its divisors is an integer number (1802640).

Almost surely, 2^12618438 is an apocalyptic number.

12618438 is an abundant number, since it is smaller than the sum of its proper divisors (16223802).

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

12618438 is a wasteful number, since it uses less digits than its factorization.

12618438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300451.

The product of its digits is 9216, while the sum is 33.

The square root of 12618438 is about 3552.2440794517. The cubic root of 12618438 is about 232.8101260932.

The spelling of 12618438 in words is "twelve million, six hundred eighteen thousand, four hundred thirty-eight".