2786128697 has 6 divisors (see below), whose sum is σ = 3062439114. Its totient is φ = 2532844160.

The previous prime is 2786128693. The next prime is 2786128703. The reversal of 2786128697 is 7968216872.

It can be written as a sum of positive squares in only one way, i.e., 2325554176 + 460574521 = 48224^2 + 21461^2 .

It is not a de Polignac number, because 2786128697 - 2² = 2786128693 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2786128693) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11512808 + ... + 11513049.

It is an arithmetic number, because the mean of its divisors is an integer number (510406519).

Almost surely, 2^2786128697 is an apocalyptic number.

It is an amenable number.

2786128697 is a deficient number, since it is larger than the sum of its proper divisors (276310417).

2786128697 is a wasteful number, since it uses less digits than its factorization.

2786128697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23025879 (or 23025868 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 56.

The square root of 2786128697 is about 52783.7919914816. The cubic root of 2786128697 is about 1407.1283871404.

The spelling of 2786128697 in words is "two billion, seven hundred eighty-six million, one hundred twenty-eight thousand, six hundred ninety-seven".