2788081 has 2 divisors, whose sum is σ = 2788082. Its totient is φ = 2788080.

The previous prime is 2788069. The next prime is 2788091. The reversal of 2788081 is 1808872.

2788081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2640625 + 147456 = 1625^2 + 384^2 .

It is a cyclic number.

It is not a de Polignac number, because 2788081 - 2²¹ = 690929 is a prime.

It is a super-2 number, since 2×2788081² = 15546791325122, which contains 22 as substring.

2788081 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (2788021) 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 as a sum of consecutive naturals, namely, 1394040 + 1394041.

It is an arithmetic number, because the mean of its divisors is an integer number (1394041).

2^2788081 is an apocalyptic number.

It is an amenable number.

2788081 is a deficient number, since it is larger than the sum of its proper divisors (1).

2788081 is an equidigital number, since it uses as much as digits as its factorization.

2788081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7168, while the sum is 34.

The square root of 2788081 is about 1669.7547724142. The cubic root of 2788081 is about 140.7456979231.

The spelling of 2788081 in words is "two million, seven hundred eighty-eight thousand, eighty-one".