2399678730 has 32 divisors (see below), whose sum is σ = 6399144000. Its totient is φ = 639914256.

The previous prime is 2399678719. The next prime is 2399678731. The reversal of 2399678730 is 378769932.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (2399678731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4443580 + ... + 4444119.

It is an arithmetic number, because the mean of its divisors is an integer number (199973250).

Almost surely, 2^2399678730 is an apocalyptic number.

2399678730 is an abundant number, since it is smaller than the sum of its proper divisors (3999465270).

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

2399678730 is a wasteful number, since it uses less digits than its factorization.

2399678730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8887715 (or 8887709 counting only the distinct ones).

The product of its (nonzero) digits is 3429216, while the sum is 54.

The square root of 2399678730 is about 48986.5157977172. The cubic root of 2399678730 is about 1338.8061561862.

The spelling of 2399678730 in words is "two billion, three hundred ninety-nine million, six hundred seventy-eight thousand, seven hundred thirty".