12399147838 has 32 divisors (see below), whose sum is σ = 23987612160. Its totient is φ = 4664254560.

The previous prime is 12399147833. The next prime is 12399147847. The reversal of 12399147838 is 83874199321.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12399147833) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1383706 + ... + 1392637.

It is an arithmetic number, because the mean of its divisors is an integer number (749612880).

Almost surely, 2^12399147838 is an apocalyptic number.

12399147838 is a deficient number, since it is larger than the sum of its proper divisors (11588464322).

12399147838 is a wasteful number, since it uses less digits than its factorization.

12399147838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2776392.

The product of its digits is 2612736, while the sum is 55.

The spelling of 12399147838 in words is "twelve billion, three hundred ninety-nine million, one hundred forty-seven thousand, eight hundred thirty-eight".