12388239 has 6 divisors (see below), whose sum is σ = 17894136. Its totient is φ = 8258820.

The previous prime is 12388231. The next prime is 12388241. The reversal of 12388239 is 93288321.

It is a happy number.

12388239 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12388239 - 2³ = 12388231 is a prime.

It is a super-2 number, since 2×12388239² = 306936931042242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12388231) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 688227 + ... + 688244.

It is an arithmetic number, because the mean of its divisors is an integer number (2982356).

Almost surely, 2^12388239 is an apocalyptic number.

12388239 is a deficient number, since it is larger than the sum of its proper divisors (5505897).

12388239 is a wasteful number, since it uses less digits than its factorization.

12388239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1376477 (or 1376474 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 12388239 is about 3519.6930263874. The cubic root of 12388239 is about 231.3857052032.

The spelling of 12388239 in words is "twelve million, three hundred eighty-eight thousand, two hundred thirty-nine".