2786009856 has 216 divisors, whose sum is σ = 8722720944. Its totient is φ = 787046400.

The previous prime is 2786009839. The next prime is 2786009857. The reversal of 2786009856 is 6589006872.

It is a junction number, because it is equal to n+sod(n) for n = 2786009799 and 2786009808.

It is not an unprimeable number, because it can be changed into a prime (2786009857) 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 23 ways as a sum of consecutive naturals, for example, 3800466 + ... + 3801198.

Almost surely, 2^2786009856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2786009856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4361360472).

2786009856 is an abundant number, since it is smaller than the sum of its proper divisors (5936711088).

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

2786009856 is a wasteful number, since it uses less digits than its factorization.

2786009856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 867 (or 846 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 51.

The square root of 2786009856 is about 52782.6662456530. Note that the first 3 decimals coincide. The cubic root of 2786009856 is about 1407.1083800576.

The spelling of 2786009856 in words is "two billion, seven hundred eighty-six million, nine thousand, eight hundred fifty-six".