12438895 has 16 divisors (see below), whose sum is σ = 17409600. Its totient is φ = 8528352.

The previous prime is 12438887. The next prime is 12438931. The reversal of 12438895 is 59883421.

It is not a de Polignac number, because 12438895 - 2³ = 12438887 is a prime.

It is a super-2 number, since 2×12438895² = 309452217642050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1912 + ... + 5341.

It is an arithmetic number, because the mean of its divisors is an integer number (1088100).

Almost surely, 2^12438895 is an apocalyptic number.

12438895 is a deficient number, since it is larger than the sum of its proper divisors (4970705).

12438895 is an frugal number, since it uses more digits than its factorization.

12438895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7279 (or 7265 counting only the distinct ones).

The product of its digits is 69120, while the sum is 40.

The square root of 12438895 is about 3526.8817672272. The cubic root of 12438895 is about 231.7006580790.

The spelling of 12438895 in words is "twelve million, four hundred thirty-eight thousand, eight hundred ninety-five".