2678783439 has 16 divisors (see below), whose sum is σ = 3697597440. Its totient is φ = 1723246080.

The previous prime is 2678783423. The next prime is 2678783477. The reversal of 2678783439 is 9343878762.

It is not a de Polignac number, because 2678783439 - 2⁴ = 2678783423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2678783539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9234 + ... + 73775.

It is an arithmetic number, because the mean of its divisors is an integer number (231099840).

Almost surely, 2^2678783439 is an apocalyptic number.

2678783439 is a deficient number, since it is larger than the sum of its proper divisors (1018814001).

2678783439 is a wasteful number, since it uses less digits than its factorization.

2678783439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83390.

The product of its digits is 12192768, while the sum is 57.

The square root of 2678783439 is about 51756.9651254785. The cubic root of 2678783439 is about 1388.8197007385.

The spelling of 2678783439 in words is "two billion, six hundred seventy-eight million, seven hundred eighty-three thousand, four hundred thirty-nine".