2805380678 has 4 divisors (see below), whose sum is σ = 4208071020. Its totient is φ = 1402690338.

The previous prime is 2805380657. The next prime is 2805380693. The reversal of 2805380678 is 8760835082.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 701345168 + ... + 701345171.

It is an arithmetic number, because the mean of its divisors is an integer number (1052017755).

Almost surely, 2^2805380678 is an apocalyptic number.

2805380678 is a deficient number, since it is larger than the sum of its proper divisors (1402690342).

2805380678 is a wasteful number, since it uses less digits than its factorization.

2805380678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1402690341.

The product of its (nonzero) digits is 645120, while the sum is 47.

The square root of 2805380678 is about 52965.8444471529. The cubic root of 2805380678 is about 1410.3620078823.

The spelling of 2805380678 in words is "two billion, eight hundred five million, three hundred eighty thousand, six hundred seventy-eight".