2399120640 has 576 divisors, whose sum is σ = 9983877120. Its totient is φ = 534159360.

The previous prime is 2399120623. The next prime is 2399120641. The reversal of 2399120640 is 460219932.

2399120640 is a `hidden beast` number, since 2 + 3 + 9 + 9 + 1 + 2 + 0 + 640 = 666.

It is a tau number, because it is divible by the number of its divisors (576).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 2399120595 and 2399120604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2399120641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11370135 + ... + 11370345.

It is an arithmetic number, because the mean of its divisors is an integer number (17333120).

Almost surely, 2^2399120640 is an apocalyptic number.

2399120640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2399120640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4991938560).

2399120640 is an abundant number, since it is smaller than the sum of its proper divisors (7584756480).

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

2399120640 is a wasteful number, since it uses less digits than its factorization.

2399120640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295 (or 275 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 2399120640 is about 48980.8191029917. The cubic root of 2399120640 is about 1338.7023600337.

The spelling of 2399120640 in words is "two billion, three hundred ninety-nine million, one hundred twenty thousand, six hundred forty".