2778887847 has 16 divisors (see below), whose sum is σ = 3928266720. Its totient is φ = 1741335552.

The previous prime is 2778887821. The next prime is 2778887869. The reversal of 2778887847 is 7487888772.

It is not a de Polignac number, because 2778887847 - 2⁸ = 2778887591 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2778887897) 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 15 ways as a sum of consecutive naturals, for example, 4179 + ... + 74667.

It is an arithmetic number, because the mean of its divisors is an integer number (245516670).

Almost surely, 2^2778887847 is an apocalyptic number.

2778887847 is a deficient number, since it is larger than the sum of its proper divisors (1149378873).

2778887847 is a wasteful number, since it uses less digits than its factorization.

2778887847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71282.

The product of its digits is 78675968, while the sum is 66.

The square root of 2778887847 is about 52715.1576588745. The cubic root of 2778887847 is about 1405.9083376266.

The spelling of 2778887847 in words is "two billion, seven hundred seventy-eight million, eight hundred eighty-seven thousand, eight hundred forty-seven".