12438384428 has 12 divisors (see below), whose sum is σ = 22912813560. Its totient is φ = 5891866272.

The previous prime is 12438384397. The next prime is 12438384433. The reversal of 12438384428 is 82448383421.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81831401 + ... + 81831552.

It is an arithmetic number, because the mean of its divisors is an integer number (1909401130).

Almost surely, 2^12438384428 is an apocalyptic number.

It is an amenable number.

12438384428 is a deficient number, since it is larger than the sum of its proper divisors (10474429132).

12438384428 is a wasteful number, since it uses less digits than its factorization.

12438384428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163662976 (or 163662974 counting only the distinct ones).

The product of its digits is 1179648, while the sum is 47.

The spelling of 12438384428 in words is "twelve billion, four hundred thirty-eight million, three hundred eighty-four thousand, four hundred twenty-eight".