2399385138 has 16 divisors (see below), whose sum is σ = 4804877280. Its totient is φ = 798777216.

The previous prime is 2399385137. The next prime is 2399385169. The reversal of 2399385138 is 8315839932.

It is not an unprimeable number, because it can be changed into a prime (2399385133) 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, 249343 + ... + 258786.

It is an arithmetic number, because the mean of its divisors is an integer number (300304830).

Almost surely, 2^2399385138 is an apocalyptic number.

2399385138 is an abundant number, since it is smaller than the sum of its proper divisors (2405492142).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2399385138 is a wasteful number, since it uses less digits than its factorization.

2399385138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508921.

The product of its digits is 1399680, while the sum is 51.

The square root of 2399385138 is about 48983.5190446746. The cubic root of 2399385138 is about 1338.7515545982.

The spelling of 2399385138 in words is "two billion, three hundred ninety-nine million, three hundred eighty-five thousand, one hundred thirty-eight".