12388431 has 8 divisors (see below), whose sum is σ = 18019584. Its totient is φ = 7508120.

The previous prime is 12388417. The next prime is 12388459. The reversal of 12388431 is 13488321.

12388431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12388431 - 2¹⁴ = 12372047 is a prime.

It is a super-2 number, since 2×12388431² = 306946445283522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12388471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187671 + ... + 187736.

It is an arithmetic number, because the mean of its divisors is an integer number (2252448).

Almost surely, 2^12388431 is an apocalyptic number.

12388431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12388431 is a deficient number, since it is larger than the sum of its proper divisors (5631153).

12388431 is a wasteful number, since it uses less digits than its factorization.

12388431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375421.

The product of its digits is 4608, while the sum is 30.

The square root of 12388431 is about 3519.7203013876. The cubic root of 12388431 is about 231.3869005796.

It can be divided in two parts, 1238 and 8431, that added together give a palindrome (9669).

The spelling of 12388431 in words is "twelve million, three hundred eighty-eight thousand, four hundred thirty-one".