12388885 has 4 divisors (see below), whose sum is σ = 14866668. Its totient is φ = 9911104.

The previous prime is 12388877. The next prime is 12388897. The reversal of 12388885 is 58888321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58888321 = 47 ⋅1252943.

It can be written as a sum of positive squares in 2 ways, for example, as 3189796 + 9199089 = 1786^2 + 3033^2 .

It is a cyclic number.

It is not a de Polignac number, because 12388885 - 2³ = 12388877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1238884 + ... + 1238893.

It is an arithmetic number, because the mean of its divisors is an integer number (3716667).

Almost surely, 2^12388885 is an apocalyptic number.

It is an amenable number.

12388885 is a deficient number, since it is larger than the sum of its proper divisors (2477783).

12388885 is an equidigital number, since it uses as much as digits as its factorization.

12388885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2477782.

The product of its digits is 122880, while the sum is 43.

The square root of 12388885 is about 3519.7847945578. The cubic root of 12388885 is about 231.3897270976.

The spelling of 12388885 in words is "twelve million, three hundred eighty-eight thousand, eight hundred eighty-five".