12388431242 has 32 divisors (see below), whose sum is σ = 21034641600. Its totient is φ = 5422394880.

The previous prime is 12388431157. The next prime is 12388431283. The reversal of 12388431242 is 24213488321.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12388431196 and 12388431205.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 509 + ... + 157407.

It is an arithmetic number, because the mean of its divisors is an integer number (657332550).

Almost surely, 2^12388431242 is an apocalyptic number.

12388431242 is a deficient number, since it is larger than the sum of its proper divisors (8646210358).

12388431242 is a wasteful number, since it uses less digits than its factorization.

12388431242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157046.

The product of its digits is 73728, while the sum is 38.

The spelling of 12388431242 in words is "twelve billion, three hundred eighty-eight million, four hundred thirty-one thousand, two hundred forty-two".