2399404399 has 8 divisors (see below), whose sum is σ = 2745923360. Its totient is φ = 2053822176.

The previous prime is 2399404373. The next prime is 2399404481. The reversal of 2399404399 is 9934049932.

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

It is not a de Polignac number, because 2399404399 - 2⁹ = 2399403887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2399404339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 228684 + ... + 238945.

It is an arithmetic number, because the mean of its divisors is an integer number (343240420).

Almost surely, 2^2399404399 is an apocalyptic number.

2399404399 is a deficient number, since it is larger than the sum of its proper divisors (346518961).

2399404399 is an equidigital number, since it uses as much as digits as its factorization.

2399404399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468369.

The product of its (nonzero) digits is 1889568, while the sum is 52.

The square root of 2399404399 is about 48983.7156512243. The cubic root of 2399404399 is about 1338.7551368528.

The spelling of 2399404399 in words is "two billion, three hundred ninety-nine million, four hundred four thousand, three hundred ninety-nine".