2806845389 has 2 divisors, whose sum is σ = 2806845390. Its totient is φ = 2806845388.

The previous prime is 2806845337. The next prime is 2806845439. The reversal of 2806845389 is 9835486082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1746822025 + 1060023364 = 41795^2 + 32558^2 .

It is a cyclic number.

It is not a de Polignac number, because 2806845389 - 2⁸ = 2806845133 is a prime.

It is a super-2 number, since 2×2806845389² = 15756762075501122642, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2806845389.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2806845689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1403422694 + 1403422695.

It is an arithmetic number, because the mean of its divisors is an integer number (1403422695).

Almost surely, 2^2806845389 is an apocalyptic number.

It is an amenable number.

2806845389 is a deficient number, since it is larger than the sum of its proper divisors (1).

2806845389 is an equidigital number, since it uses as much as digits as its factorization.

2806845389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3317760, while the sum is 53.

The square root of 2806845389 is about 52979.6695818311. The cubic root of 2806845389 is about 1410.6074188229.

The spelling of 2806845389 in words is "two billion, eight hundred six million, eight hundred forty-five thousand, three hundred eighty-nine".